MedWorm.com provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest items from the 'Ear and Hearing' source. Sat, 10 Oct 2009 19:30:51 +0100 http://www.medworm.com/index.php?rid=2380560&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00014.htm Page: 386DOI: 10.1097/AUD.0b013e31819c4665Authors: Sininger, Yvonne S. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380560 Thu, 30 Apr 2009 21:06:38 +0100 2380560 http://www.medworm.com/index.php?rid=2380559&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00013.htm Page: 386DOI: 10.1097/AUD.0b013e31819f32c4Authors: Hogan, Cynthia (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380559 Thu, 30 Apr 2009 21:06:38 +0100 2380559 http://www.medworm.com/index.php?rid=2380558&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00012.htm Page: 385DOI: 10.1097/AUD.0b013e31819c42e9Authors: Abrams, Harvey B. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380558 Thu, 30 Apr 2009 21:06:38 +0100 2380558 http://www.medworm.com/index.php?rid=2380557&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00011.htm Page: 384DOI: 10.1097/AUD.0b013e31819c42d8Authors: Burkard, Robert (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380557 Thu, 30 Apr 2009 21:06:38 +0100 2380557 http://www.medworm.com/index.php?rid=2380556&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00010.htm Tracking of positions in space allows innovative and intuitive experiments and magnetic trackers have become increasingly popular for research on spatial hearing. Because cochlear implant (CI) systems are susceptible to magnetic interspersion, this article aims to quantify the impact of the Polhemus Liberty Latus tracking system on an Advanced Bionics HiRes 90k CI with Platinum Series speech processor. The intention was to reveal alterations in the output signals of the CI system due to interspersion of the magnetic tracker to prevent corrupted or even harmful signals reaching the CI user. No such systematic alterations were found in the measurements.Page: 380DOI: 10.1097/AUD.0b013e31819e69f1Authors: Kerber, Stefan; Seeber, Bernhard U. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380556 Thu, 30 Apr 2009 21:06:38 +0100 2380556 http://www.medworm.com/index.php?rid=2380555&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00009.htm We investigated whether a controlled reduction in auditory acuity, created by the insertion of specially designed earplugs in participants with normal hearing, would lead to unequal responses on a precedence effect task. The measurement of lag-burst thresholds was used to characterize the precedence effect. Participants with normal hearing were tested with and without the insertion of earplugs. Whereas performance was stable across participants in the condition without the earplug, it was highly variable under the earplug condition. These results suggest that uniformly degraded auditory acuity leads to increased variability in performance on tasks measuring fusion in the precedence effect.Page: 377DOI: 10.1097/AUD.0b013e31819c3e84Authors: Champoux, Francois 1,2; Houde, Marie-Soleil 1; Gagn... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380555 Thu, 30 Apr 2009 21:06:38 +0100 2380555 http://www.medworm.com/index.php?rid=2380554&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00008.htm The Utility Measures for Audiology Application (UMAA) is a measure of health-related quality of life (HRQoL) incorporating utilities. The purpose of this study was to determine if the UMAA is a stable, valid, and sensitive measure of the effects of benign paroxysmal positional vertigo (BPPV) and its treatment on HRQoL. Results indicate that the UMAA is a stable, valid, and comparable with a disease-specific measure, the Dizziness Handicap Inventory (DHI). Post-treatment utilities also indicated that the UMAA was sensitive to improvement in HRQoL after BPPV treatment. The UMAA should allow for comparison of audiologic and nonaudiologic HRQoL that is essential for the development and refinement of healthcare policies.Page: 369DOI: 10.1097/AUD.0b013e31819f316aAuthors: Roberts, Richard A. 1; A... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380554 Thu, 30 Apr 2009 21:06:38 +0100 2380554 http://www.medworm.com/index.php?rid=2380553&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00007.htm The objectives of this study were to evaluate the use of a clinical protocol designed to meet early intervention guidelines and to provide normative infant tone burst auditory brainstem response (TBABR) and behavioral responses during infancy. TBABR air-bone thresholds and latencies were different for infants with and without conductive hearing loss. TBABR thresholds in early infancy were highly correlated with behavioral thresholds also measured during infancy. The results present evidence of a feasible clinical protocol for the critical task of diagnosing hearing loss in young infants and provide important normative data for this population.Page: 350DOI: 10.1097/AUD.0b013e31819f3145Authors: Vander Werff, Kathy R. 1; Prieve, Beth A. 1; Georgantas, Lea M. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380553 Thu, 30 Apr 2009 21:06:38 +0100 2380553 http://www.medworm.com/index.php?rid=2380552&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00006.htm The ability of children to understand speech at soft and conversational levels with two instantaneous input dynamic range (IIDR) settings (30 & 40) on the Freedom Cochlear Implant Processor™ was examined for thirty children (age 7-17). Aided threshold and recorded speech perception testing was conducted using FM tones, noise-bands, Ling 6 sounds, loudness scaling, CNC words at 50 & 60 dB SPL and the BKB-SIN. Results revealed that mean group thresholds were 6-8 dB better with the 40 IIDR. Group mean CNC word scores at 50 dB SPL were significantly better with the 40 IIDR (59.2% vs. 47.8%) while the CNC word scores at 60 dB SPL and BKB-SIN scores at 65 dB SPL were not significantly different. It was concluded that an IIDR of 40 provided significantly better sound-field th... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380552 Thu, 30 Apr 2009 21:06:38 +0100 2380552 http://www.medworm.com/index.php?rid=2380551&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00005.htm Overall TEOAE levels and half-octave frequency bands centered at 1.5, 2, 3, and 4 kHz were measured for 79 neonates before leaving the hospital and again at 1 mo of age. TEOAE levels increased between test sessions, with greater increases in higher frequency bands. Infants who failed the screening at birth but passed at 1 mo had significantly lower TEOAEs at the rescreening than infants who passed at birth, although pass status was only a weak predictor of TEOAEs at 1 mo. No significant correlation was found between TEOAE changes and judgments of ear-canal debris.Page: 330DOI: 10.1097/AUD.0b013e31819c4000Authors: Prieve, Beth A.; Hancur-Bucci, Catherine A.; Preston, Jonathan L. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380551 Thu, 30 Apr 2009 21:06:38 +0100 2380551 http://www.medworm.com/index.php?rid=2380550&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00004.htm The purpose of this study was to determine whether the electrically evoked acoustic change complex (EACC) could be used to assess sensitivity to changes in stimulus level in cochlear implant recipients. Twelve postlingually deafened adults using Nucleus CI24 participated in this study. The stimulus consisted of an 800 msec burst of a 1000 pps biphasic pulse train. A change in the stimulus level was introduced 400 msec after stimulus onset. EACCs could be recorded from cochlear implant users in response to both increases and decreases in stimulation level. Increases in stimulus level elicited more robust EACC responses than decreases.Page: 320DOI: 10.1097/AUD.0b013e31819c42b7Authors: Kim, Jae-Ryong 1,3; Brown, Carolyn J. 1,2; Abbas, Paul J. 1,2; Etler, Christine P. 1; O'Brien, Sara 1 (Sourc... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380550 Thu, 30 Apr 2009 21:06:38 +0100 2380550 http://www.medworm.com/index.php?rid=2380549&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00003.htm The alternate binaural bithermal (ABB) caloric test can be shortened by irrigating each ear using a single temperature (i.e., monothermal warm screening test or MWST) and discontinuing the test if responses are symmetric. The goal of the MWST is to decrease test time and increase patient comfort without sacrificing the sensitivity of the ABB caloric test. The present study evaluated the performance of the MWST using ROC curves and several gold standards for unilateral weakness on the ABB caloric test. The results indicate that the use of a 10% inter-ear difference produces clinically acceptable false-negative rates (1-3%) and reduces the number of unnecessary ABB caloric tests.Page: 313DOI: 10.1097/AUD.0b013e31819c3ec7Authors: Murnane, Owen D. 1,2; Akin, Faith W. 1,2; Lynn, Susan G. 3; Cyr... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380549 Thu, 30 Apr 2009 21:06:38 +0100 2380549 http://www.medworm.com/index.php?rid=2380548&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00002.htm This study addresses this issue. Baseline data of the National Longitudinal Study on Hearing, including 1511 participants (18 - 70 years, Mean: 46.3 years) are analyzed. Hearing status was determined using a speech-in-noise test over the Internet. Psychosocial health was assessed using online questionnaires. Significant associations between reduced hearing and distress, somatization, depression and loneliness are found. The associations differ among age groups The findings underline the need to address the adverse effects of limited hearing among young and middle-aged adults both in research and clinical practice.Page: 302DOI: 10.1097/AUD.0b013e31819c6e01Authors: Nachtegaal, Janneke 1,4; Smit, Jan H. 2,4; Smits, Cas 1,4; Bezemer, Pieter D. 3,4; van Beek, Johannes H. M. 1,4; Festen, Joost M... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380548 Thu, 30 Apr 2009 21:06:38 +0100 2380548 http://www.medworm.com/index.php?rid=2380547&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200906000-00001.htm This study aimed to evaluate the test-retest reliability of the acoustic stapedial reflex (ASR) test in healthy neonates. ASRs were elicited by presenting a 2-kHz pure tone and broadband noise (BBN) separately to the test ear in an ipsilateral stimulation mode. For both stimuli, the ASR test showed high test-retest reliability as demonstrated by intracorrelation coefficients across the test-retest conditions of 0.83 for the 2-kHz pure tone and 0.76 for the BBN stimulus. The high intracorrelation coefficients obtained in this study illustrate the reliability of the ASR test. Given the high test-retest reliability, the ASR test holds promise as a useful diagnostic/screening instrument in ascertaining the hearing status in neonates.Page: 295DOI: 10.1097/AUD.0b013e31819c3ea0Authors: Mazlan, Ra... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2380547 Wed, 29 Apr 2009 23:34:40 +0100 2380547 http://www.medworm.com/index.php?rid=2231945&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00014.htm The acoustic measurements in the Disc-Jockeys booths show average equivalent sound levels of 98.7 dB (A) Leq, with high sound levels in the bass frequencies (114.3 dB (Z) at 125 Hz). The Disc-Jockeys studied here are mainly young men who work in nightclubs for 6 years during 3 nights a week. Three quarters of them have tinnitus with a pitch corresponding to the frequency of hearing loss. In addition to the expected dip at 6 kHz, there is also a loss in the low frequencies audiogram, a phenomenon that has not previously been described as a consequence of excessive noise.Page: 291DOI: 10.1097/AUD.0b013e31819769fcAuthors: Potier, Morgan 1,2; Hoquet, Caroline 2; Lloyd, Ruth 1,3; Nicolas-Puel, Cecile 1,2,3; Uziel, Alain 1,2,3; Puel, Jean-Luc 1,2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231945 Wed, 04 Mar 2009 20:17:24 +0100 2231945 http://www.medworm.com/index.php?rid=2231944&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00013.htm This article describes the conceptual basis of an approach for using ANSI S3.44-1996 to predict hearing thresholds in a population even when noise exposure levels and durations are not precisely known, and to demonstrate the initial application of this approach to a single military population. This approach uses retrospective hearing threshold data of a population to estimate the equivalent noise exposure level for use in the ANSI S3.44-1996 algorithm.Page: 287DOI: 10.1097/AUD.0b013e3181942732Authors: Tufts, Jennifer B. 1; Weathersby, Paul K. 2; Marshall, Lynne 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231944 Wed, 04 Mar 2009 20:17:24 +0100 2231944 http://www.medworm.com/index.php?rid=2231943&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00012.htm In this study, we measured both the ability to detect a short break in interaural correlation when there was a zero intersound delay, and the longest delay at which a 100-msec break in interaural correlation was detectable in both younger adults and older adults with clinically normal hearing. The age-related more rapid decay in the storage of waveform details, combined with the lesser sensitivity to change in correlation and to spectral cues, suggest that older adults may not be as capable as younger adults in parsing auditory scenes.Page: 273DOI: 10.1097/AUD.0b013e318198703dAuthors: Li, Liang 1; Huang, Juan 1; Wu, Xihong 1; Qi, James G. 2; Schneider, Bruce A. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231943 Wed, 04 Mar 2009 20:17:24 +0100 2231943 http://www.medworm.com/index.php?rid=2231942&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00011.htm This study evaluated the speech comprehension benefit obtained from partly incorrect subtitles generated by automatic speech recognition. Listeners with normal hearing and listeners with hearing impairment performed auditory-alone speech reception threshold (SRT) tests, and audiovisual SRT tests (auditory sentences plus subtitles); the difference between both SRTs was defined as the benefit. Participants also rated the listening effort. Age and hearing loss did not influence the benefit and effort scores. Lower automatic speech recognition accuracies and higher text delays decreased the benefit and increased the effort. A higher age and a lower working memory capacity were associated with more effortful audiovisual tests; participants with more severe hearing loss obtained more benefit fro... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231942 Wed, 04 Mar 2009 20:17:24 +0100 2231942 http://www.medworm.com/index.php?rid=2231941&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00010.htm In this study, young CI-users' sound-detection ability was assessed using the observer-based psychophysical procedure. Detection accuracy and reaction time were examined. A stimulation method was developed to present single-electrode stimulation with concurrent ambient sound processing on other electrodes. Detection accuracy generally increased, and in some children, reaction time decreased, with increasing stimulus level. Asymptotic detection accuracy was comparable with that reported for normal-hearing children. Psychometric function slopes were comparable or shallower than those reported for adult CI users.Page: 250DOI: 10.1097/AUD.0b013e3181986dfeAuthors: Dasika, Vasant K. 1; Werner, Lynne A. 2; Norton, Susan J. 3,1; Nie, Kaibao 1; Rubinstein, Jay T. 1,3 (Source: Ear and Hearing... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231941 Wed, 04 Mar 2009 20:17:24 +0100 2231941 http://www.medworm.com/index.php?rid=2231940&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00009.htm The present study investigated interactions between unsupervised learning and the degree of spectral mismatch on short-term perceptual adaptation to spectrally shifted vowels. Normal-hearing listeners were repeatedly tested over a 5-day study period while listening to acoustic cochlear-implant simulations; no feedback or explicit training was provided. The results from this study suggest that listeners are able to passively adapt to spectral shifts of up to 6 mm. For a spectral shift of 8.3 mm, some automatic adaptation was observed with mixed exposure to a smaller spectral shift, even at the expense of some low-frequency speech information.Page: 238DOI: 10.1097/AUD.0b013e31819769acAuthors: Li, Tianhao 1; Galvin, John J. III 2; Fu, Qian-Jie 1,2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231940 Wed, 04 Mar 2009 20:17:24 +0100 2231940 http://www.medworm.com/index.php?rid=2231939&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00008.htm Conclusions support loudness assessment for hearing-aid fittings. A subjective effect may result from expectations about loudness, termed Binaural Loudness Constancy.Page: 234DOI: 10.1097/AUD.0b013e3181976993Authors: Epstein, Michael 1,2,3; Florentine, Mary 2,4 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231939 Wed, 04 Mar 2009 20:17:24 +0100 2231939 http://www.medworm.com/index.php?rid=2231938&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00007.htm Sixty-two normal-hearing adults and 28 patients diagnosed with otosclerosis served as subjects. Overall, energy reflectance (ER) in the otosclerotic ears was statistically higher than ER in the normal ears between 400 and 1000 Hz. Analysis of receiver operating characteristic plots revealed that ER is potentially useful in differentiating otosclerotic ears from normal ears. More importantly, comparison of the test performance in individual otosclerotic ears between ER and tympanometric measures revealed that the information provided by ER is supplemental to the information provided by tympanometry. Therefore, combination of tympanometry and ER could potentially improve distinguishing otosclerotic ears from normal ears.Page: 219DOI: 10.1097/AUD.0b013e3181976a14Authors: Shahnaz, Navid 1; Bor... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231938 Wed, 04 Mar 2009 20:17:24 +0100 2231938 http://www.medworm.com/index.php?rid=2231937&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00006.htm Observed and predicted sentence recognition in babble and benefit of spatial separation were measured as a function of low-pass cutoff frequency with and without bilateral hearing aids. Predictions were determined with an importance-weighted speech-audibility metric (aided audibility index). Hearing aid benefit improved significantly as cutoff frequency increased, but only with spatial separation. Likewise, spatial benefit improved significantly as cutoff frequency increased, but only when aided. Hearing aid benefit was significantly less than predicted, whereas spatial benefit was significantly greater than predicted. Questionnaires administered to assess listeners' perspectives on hearing aid success supported an association between subjective and objective measures of speech reco... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231937 Wed, 04 Mar 2009 20:17:24 +0100 2231937 http://www.medworm.com/index.php?rid=2231936&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00005.htm DPOAEs were measured for f2 = 600 to 8000 Hz before and after the subjects voluntarily induced negative middle-ear pressures (MEPs) (-40 to -420 daPa). The negative MEP significantly decreased the DPOAE level for low and some middle frequencies, but had minimal effect at 2000 Hz. As the negative MEP was compensated by applying an equivalent amount of negative pressure into the ear canal, normal DPOAE levels were re-established. The study suggests that the compensation procedure is effective and could be valuable in clinical applications. The results also provide insight into resonance characteristics of the middle ear.Page: 191DOI: 10.1097/AUD.0b013e31819769e1Authors: Sun, Xiao-Ming; Shaver, Mark D. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231936 Wed, 04 Mar 2009 20:17:24 +0100 2231936 http://www.medworm.com/index.php?rid=2231935&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00004.htm Procedures for measuring sound localization, sound lateralization, and binaural masking level differences in young children were developed. The modified tests were administered to large groups of children aged between 4 and 9 yr and results showed that the procedures were suitable for testing children from the age of 4 to 5. Furthermore, on these binaural hearing tests 5-yr-old children performed similar to adults. Differences between 4-yr-olds and older subjects on localization and BMLD, or between 4 to 9-yr-olds and adults on lateralization were probably attributable to both a development in binaural hearing and to nonauditory factors.Page: 178DOI: 10.1097/AUD.0b013e318194256bAuthors: Deun, Lieselot Van 1; van Wieringen, Astrid 1; Van den Bogaert, Tim 1; Scherf, Fanny 2; Offeciers, F Erw... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231935 Wed, 04 Mar 2009 20:17:24 +0100 2231935 http://www.medworm.com/index.php?rid=2231934&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00003.htm Previous studies have shown that fine structure information and detailed spectral information can be beneficial for lexical tone recognition. The present study examined tone recognition of Mandarin-Chinese-speaking children with cochlear implants who used the HiRes and then HiRes 120 sound-processing strategies. Results from 20 prelingually deafened children showed that there were large individual differences in tone recognition using either strategy. Some of the children achieved high-level tone-recognition performance with HiRes and some more of the children achieved high-level performance with HiRes 120. Children who benefited from either HiRes or HiRes 120 tended to be those who were implanted at younger ages.Page: 169DOI: 10.1097/AUD.0b013e31819342cfAuthors: Han, Demin 1; Liu, Bo 1; Z... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231934 Wed, 04 Mar 2009 20:17:24 +0100 2231934 http://www.medworm.com/index.php?rid=2231933&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00002.htm Cochlear implant melody recognition is best when listening to high-frequency melodies (414-1046 Hz) as opposed to low- or middle- frequency melodies (104-262 and 207-523 Hz) and when listening to pure tones instead of complex harmonic tones. The number of electrodes had no effect on low- and middle-frequency melody recognition, but affected high-frequency melody recognition in a way similar to phoneme recognition. Similar to speech recognition, cochlear implant melody recognition exhibited large individual variability. The source of the large variability in melody recognition seems to be different from the source of the variability in speech recognition.Page: 160DOI: 10.1097/AUD.0b013e31819342b9Authors: Singh, Sonya 1; Kong, Ying-Yee 2; Zeng, Fan-Gang 3 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231933 Wed, 04 Mar 2009 20:17:24 +0100 2231933 http://www.medworm.com/index.php?rid=2231932&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200904000-00001.htm Noise-induced hearing loss (NIHL) is a condition that is influenced by both environmental factors and genetic factors. Association studies have identified the first genetic factors that may influence one's susceptibility to NIHL. In this review, we discuss the general properties of NIHL and mainly focus on the results of these first genetic association studies for NIHL.Page: 151DOI: 10.1097/AUD.0b013e3181987080Authors: Konings, Annelies; Laer, Lut Van; Camp, Guy Van (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2231932 Wed, 04 Mar 2009 17:45:53 +0100 2231932 http://www.medworm.com/index.php?rid=2080889&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00020.htm Page: 149DOI: 10.1097/AUD.0b013e318192769fAuthors: Rosowski, John J. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080889 Tue, 06 Jan 2009 06:59:48 +0100 2080889 http://www.medworm.com/index.php?rid=2080888&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00019.htm Page: 148DOI: 10.1097/AUD.0b013e3181927530Authors: Probst, Rudolf 1; Watanabe, Tomoo 2; Bertoli, Sibylle 3 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080888 Tue, 06 Jan 2009 06:59:48 +0100 2080888 http://www.medworm.com/index.php?rid=2080887&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00018.htm Page: 147DOI: 10.1097/AUD.0b013e318192751aAuthors: Sohmer, Haim 1; Sichel, Jean-Yves 2; Perez, Ronen 2; Adelman, Cahtia 3 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080887 Tue, 06 Jan 2009 06:59:48 +0100 2080887 http://www.medworm.com/index.php?rid=2080886&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00017.htm The purpose of this study was to determine whether there were consistent morphological cochlear abnormailities during gestational development that could be associated with Turner Syndrome (TS). Gross morphologic examination of nine fetal TS temporal bones autopsied after spontaneous abortion failed to reveal a consistent pattern of cochlear malformations.Page: 143DOI: 10.1097/AUD.0b013e3181906c30Authors: Fish, John H. III 1; Schwentner, Ilona 1; Schmutzhard, Joachim 1; Abraham, Irene 1; Ciorba, Andrea 3; Martini, Alessandro 3; Sergi, Consolato 2; Schrott-Fischer, Anneliese 1,4; Glueckert, Rudolf 1,4 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080886 Tue, 06 Jan 2009 06:59:48 +0100 2080886 http://www.medworm.com/index.php?rid=2080885&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00016.htm Speech perception is significantly impaired, in quiet as well as in noise, in individuals with auditory neuropathy. The recent signal processing strategies have shown that enhancing the envelope of speech may improve speech perception in quiet for these individuals. The present study assessed speech perception with unprocessed and envelope-enhanced speech in noise. Results revealed that speech identification improved significantly both in quiet and in the presence of noise with envelope-enhanced speech. Results suggest that envelope enhancement may be a viable option for the rehabilitation of individuals with auditory neuropathy.Page: 136DOI: 10.1097/AUD.0b013e3181926545Authors: Narne, Vijaya Kumar 1; Vanaja, C S. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080885 Tue, 06 Jan 2009 06:59:48 +0100 2080885 http://www.medworm.com/index.php?rid=2080884&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00015.htm The current study examined how implanted children educated in an auditory-oral environment compared with hearing peers on a receptive vocabulary measure (PPVT) in overall achievement and growth rates. We also investigated the effect of age at implant on vocabulary development. On average, implanted children had smaller vocabularies than hearing peers, but demonstrated substantial growth, making more than 1 yr worth of progress in a year. Age at implantation significantly affected vocabulary development. Growth curves indicated that children who are implanted under the age of 2 yr can achieve receptive vocabulary skills well within the average range for hearing children.Page: 128DOI: 10.1097/AUD.0b013e3181926524Authors: Hayes, Heather 1; Geers, Ann E. 2; Treiman, Rebecca 1; Moog, Jean Sacha... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080884 Tue, 06 Jan 2009 06:59:48 +0100 2080884 http://www.medworm.com/index.php?rid=2080883&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00014.htm NRT thresholds were compared to T- and C-levels in children's optimized MAPs. Forty-one children (2 to 14 yr) with stable electrical hearing participated. At least 1 yr postactivation, visual (vNRT) and predicted (tNRT) thresholds were obtained and compared to children's T- and C-levels. The group average vNRT and tNRT thresholds in the upper half of the dynamic range agrees with previous studies. The profile of vNRT thresholds did not parallel the profiles of Ts and Cs across electrodes for most children. Hierarchical linear modeling analysis showed substantial and significant heterogeneity in the relations between vNRT and T-levels and between vNRT and C-levels.Page: 115DOI: 10.1097/AUD.0b013e3181906c0fAuthors: Holstad, Beth A. 1; Sonneveldt, Valerie G. 1; Fears, Beverly T. 2; Davidson, ... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080883 Tue, 06 Jan 2009 06:59:48 +0100 2080883 http://www.medworm.com/index.php?rid=2080882&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00013.htm Eighty-eight patients with severe to profound sudden sensorineural hearing loss (SSHL) were enrolled. Pre-treatment hearing levels, results of audiovestibular function tests and hearing outcomes were recorded from chart reviews. Multivariate analyses showed that both present ABR and VEMP waveforms were significantly correlated with better hearing outcomes in the group of severe SSHL, while the presence of vertigo was the only significant negative prognostic factor in the group of profound SSHL. Age, gender, Diabetes mellitus, hypertension, and delay of treatment, were not significantly related to hearing outcomes. A presumed table in predicting hearing outcomes is suggested for patients with severe SSHL.Page: 110DOI: 10.1097/AUD.0b013e318192655eAuthors: Wang, Chi-Te 1,2; Huang, Tsung-Wei 1... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080882 Tue, 06 Jan 2009 06:59:48 +0100 2080882 http://www.medworm.com/index.php?rid=2080881&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00012.htm Auditory steady-state responses to multiple stimuli presented simultaneously are affected by the intensity frequency and rate of the stimuli. At 73 dB SPL, multiple stimuli presented simultaneously evoke smaller responses than when the stimuli are presented singly, particularly for carrier frequencies 1000 and 2000 Hz. Dichotically presented stimuli evoke responses 0.3 msec earlier than monotically presented stimuli. When stimuli with the same carrier frequency but different modulation rates are presented to the two ears, the stimulus with the faster modulation rate will evoke a larger response, provided the carrier frequency is less than 2000 Hz and the modulation rate less than 90 Hz. Gender, handedness and ear of stimulation do not consistently alter the responses.Page: 100DOI: 10.1097/... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080881 Tue, 06 Jan 2009 06:59:48 +0100 2080881 http://www.medworm.com/index.php?rid=2080880&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00011.htm This study applied an innovative approach to design Mandarin monosyllable recognition test word lists from familiar and homogeneous monosyllables, in which the familiarity, homogeneity, and phonemic balance of the six 25-item and nine 50-item word lists were strictly controlled. These word lists exhibit interlist equivalence with respect to their psychometric functions and five psychometric characteristics; moreover, their interitem and intersubject variability are lower than those of previously reported lists. In this way, we believe that the Mandarin monosyllable recognition test lists would be able to have better reliability and sensitivity in diagnosing hearing disorders.Page: 90DOI: 10.1097/AUD.0b013e31818f28a6Authors: Tsai, Kuen-Shian 1; Tseng, Li-Hui 2; Wu, Cheng-Jung 2; Young, Shue... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080880 Tue, 06 Jan 2009 06:59:48 +0100 2080880 http://www.medworm.com/index.php?rid=2080879&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00010.htm Establishing methods for topical administration of drugs to the inner ear have great clinical relevance and potential even in a relatively short perspective. We evaluated the efficacy of sodium hyaluronate (HYA) as a vehicle for drugs that could be used for topical treatment of inner ear disorders through the round window membrane (RWM). Neomycin was chosen as a tracer for drug release and pharmacodynanic effect. The resulting hair cell loss shows a clear dose-dependence and confirm that that HYA is a safe vehicle for drugs aimed to pass into the inner ear through the RWM.Page: 81DOI: 10.1097/AUD.0b013e31818ff98eAuthors: Saber, Amanj 1,2; Laurell, Goran 3; Bramer, Tobias 4; Edsman, Katarina 4; Engmer, Cecilia 1,2; Ulfendahl, Mats 1,2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080879 Tue, 06 Jan 2009 06:59:48 +0100 2080879 http://www.medworm.com/index.php?rid=2080878&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00009.htm The waking effectiveness of auditory, visual, or tactile alarms in the hard-of-hearing was compared, using signals of increasing intensities. A 520-Hz square wave auditory signal awoke 92%, compared with 56% for the high-pitched current smoke alarm (both 75 dBA). Bed/pillow shakers awoke 80 to 84% at the purchased intensity. Strobe lights awoke 27% at an intensity above the US standard, indicating that they are unreliable for waking people who are hard-of-hearing. The literature shows that the low-frequency square wave is the best alarm signal in all populations tested, and it is argued that it should be adopted as the normal smoke alarm signal.Page: 73DOI: 10.1097/AUD.0b013e3181906f89Authors: Bruck, Dorothy 1; Thomas, Ian R. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080878 Tue, 06 Jan 2009 06:59:48 +0100 2080878 http://www.medworm.com/index.php?rid=2080877&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00008.htm Eight hundred and sixty-five randomly selected individuals were screened to determine those who scored poorly on the Distorted Tunes Test (DTT). Thirty-five individuals with tune deafness constituted the experimental group. Thirty-four individuals with normal hearing and normal DTT scores, matched for age, gender, handedness, and education, and without overt or reported psychiatric disorders made up the normal control group. Results demonstrate that a wide variety of auditory processing deficits exist in tune deaf individuals. These include pure tone frequency discrimination, pitch and duration pattern discrimination, and temporal resolution. Overall, reduction in performance does not appear to derive from deficits in memory or attention.Page: 63DOI: 10.1097/AUD.0b013e31818ff95eAuthors: Jo... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080877 Tue, 06 Jan 2009 06:59:48 +0100 2080877 http://www.medworm.com/index.php?rid=2080876&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00007.htm Using a clinical sample and videonystagmographic recording, we derived optimum criteria for use in the monothermal caloric test. We then assessed the performance of the warm and cool monothermal tests to accurately predict whether the bithermal test result would be normal. Using our recommended criteria, the warm test provided a sensitivity of 95% with 29% of patients with normal bithermal results having to undergo the bithermal test. The cool test performed less well and we do not recommend its routine clinical use. We believe that the warm/cool monothermal test difference is probably a consequence of the interrelationship between canal paresis and directional preponderance.Page: 54DOI: 10.1097/AUD.0b013e31818f006cAuthors: Lightfoot, Guy 1; Barker, Fiona 2; Belcher, Keri 3; Kennedy, Vicki... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080876 Tue, 06 Jan 2009 06:59:48 +0100 2080876 http://www.medworm.com/index.php?rid=2080875&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00006.htm Tuning curves were measured in 10 sedated dogs and six sleeping human adults by plotting the masking function of steady state potentials evoked by an amplitude-modulated tone. Canine auditory steady state evoked potential-derived (ASSEP) tuning curves were quantitatively and qualitatively similar to electrophysiologic tuning curves reported in other species. Human ASSEP tuning curves were slightly wider than psychophysical ones obtained in the same subjects, but sharper than published neurophysiologic ones using other methods. Psychophysical results did not suggest that the use of an amplitude-modulated tone affected tuning curve parameters. Results demonstrate the feasibility of measuring tuning curves using ASSEP.Page: 43DOI: 10.1097/AUD.0b013e31818fbb7aAuthors: Markessis, Emily 1; Ponce... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080875 Tue, 06 Jan 2009 06:59:48 +0100 2080875 http://www.medworm.com/index.php?rid=2080874&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00005.htm The goal of this study was to define the effects of hearing loss, separate from age, on perception, and neural response patterns of dynamic spectral cues. In young adults with and without hearing loss, psychometric functions and N1-P2 cortical-evoked potentials were compared. Responses were evoked by consonant-vowel stimuli with and without frequency-dependent amplification that enhanced F2 relative to the rest of the stimulus. Results show hearing loss, separate from aging, negatively impacts identification, and neural representation of time-varying spectral cues. Enhancing the audibility of the F2 formant transition relative to the rest of the stimulus does not overcome these effects.Page: 31DOI: 10.1097/AUD.0b013e31818f359fAuthors: Harkrider, Ashley W.; Plyler, Patrick N.; Hedrick, Mark... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080874 Tue, 06 Jan 2009 06:59:48 +0100 2080874 http://www.medworm.com/index.php?rid=2080873&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00004.htm Auditory steady state responses (ASSRs) can be recorded in sleeping neonates and can be used to estimate hearing thresholds. However, artifactual responses can contaminate recordings, particularly when recording bone conduction ASSRs. Using a simulation of a patient and the research MASTER system, this investigation studied the presence of artifact in bone conduction ASSRs and methods of eliminating it. It was determined that in situations where the sampling rate cannot be altered to prevent aliasing of the artifact to the modulation rates, screening and grounding the B-71 transducer and cable can significantly reduce artifact amplitude to levels not significantly above background noise.Page: 23DOI: 10.1097/AUD.0b013e31819144bdAuthors: Brooke, Ruth Elizabeth 1; Brennan, Siobhan Katharine 2... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080873 Tue, 06 Jan 2009 06:59:48 +0100 2080873 http://www.medworm.com/index.php?rid=2080872&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00003.htm The aim was to investigate whether cortical auditory-evoked potentials in response to monosyllabic words can be approximated by a composition of single, subsequent N1/P2 complexes considering the voice-onset time. The N1/P2 complexes used for the approximation were derived from the cortical responses to tone bursts. The approximations were fitted toward the measured speech-evoked potentials by means of an optimization procedure. Close matches could be gained. Hence, an acoustic change complex could be shown even in the case of strong temporal overlap of the constituting N1 and P2 components.Page: 16DOI: 10.1097/AUD.0b013e31818fbb9dAuthors: Burger, Martin 1; Hoppe, Ulrich 2; Lohscheller, Jorg 1; Eysholdt, Ulrich 1; Dollinger, Michael 1 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080872 Tue, 06 Jan 2009 06:59:48 +0100 2080872 http://www.medworm.com/index.php?rid=2080871&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00002.htm This study examined the noise exposure and hearing of fishermen from small-scale fisheries in Brazil. Participants included 141 male fishermen, and 136 controls matched by socioeconomic group, age, and gender. Fishermen with current or a history of occupational noise exposure had significantly poorer thresholds and more prevalent abnormal otoacoustic emissions than controls or unexposed participants. The results suggest a need for noise control, audiological care and hearing loss prevention services to be made available to workers from small-scale fisheries.Page: 8DOI: 10.1097/AUD.0b013e31818fba17Authors: Paini, Michele C. 1; Morata, Thais C. 1,2; Corteletti, Lilian Jacob 1; Albizu, Evelyn 3; Marques, Jair M. 1; Santos, Lorayne 1 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080871 Tue, 06 Jan 2009 06:59:48 +0100 2080871 http://www.medworm.com/index.php?rid=2080870&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200901000-00001.htm Mutations or deletions in the GJB2 and GJB6 genes are reported to account for 50% of recessive deafness. Aiming at establishing the frequencies of GJB2 mutations and GJB6 deletions in the Brazilian population, we screened 300 individuals with hearing impairment. The c.35delG and del(GJB6-D13S1830) were most frequent mutations. Nineteen different sequence variations were found in the GJB2 gene (two of them were novel substitutions, p.Leu81Val and p.Met195Val). The present study demonstrated that mutations in the GJB2 gene and del(GJB6-D13S1830) are important causes of hearing impairment in Brazil. The diversity of variants in our sample reflects the ethnic heterogeneity of the Brazilian population.Page: 1DOI: 10.1097/AUD.0b013e31819144adAuthors: Batissoco, Ana Carla 1; Abreu-Silva, Ronaldo ... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=2080870 Tue, 06 Jan 2009 00:50:50 +0100 2080870 http://www.medworm.com/index.php?rid=1929928&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00019.htm Page: 979DOI: 10.1097/01.aud.0000339411.98443.eb (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929928 Tue, 04 Nov 2008 11:47:03 +0100 1929928 http://www.medworm.com/index.php?rid=1929927&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00018.htm Page: 976DOI: 10.1097/AUD.0b013e31818bc163Authors: Sininger, Yvonne S. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929927 Tue, 04 Nov 2008 11:47:03 +0100 1929927 http://www.medworm.com/index.php?rid=1929926&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00017.htm Page: 973DOI: 10.1097/AUD.0b013e31818bc150Authors: Grose, John H. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929926 Tue, 04 Nov 2008 11:47:03 +0100 1929926 http://www.medworm.com/index.php?rid=1929925&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00016.htm Page: 972DOI: 10.1097/AUD.0b013e31818bbd1dAuthors: King, John E. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929925 Tue, 04 Nov 2008 11:47:03 +0100 1929925 http://www.medworm.com/index.php?rid=1929924&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00015.htm Page: 971DOI: 10.1097/AUD.0b013e3181888f9bAuthors: Shera, Christopher A. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929924 Tue, 04 Nov 2008 11:47:03 +0100 1929924 http://www.medworm.com/index.php?rid=1929923&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00014.htm Three new texts on diverse subjects are reviewed in this issue. According to Ryan Branski & Kyung Peck, Neuroimaging in Communication Sciences and Disorders (by Roger Ingham) is an ideal reference on this subject that is long overdue. Christopher Shera describes the 3rd edition of Otoacoustic Emissions: Clinical Applications, (edited by Robinette & Glattke) as a comprehensive book that includes valuable new information about this rapidly changing topic. John King reports that Balance Function Assessment & Management, (edited by Jacobson & Shepard) is an excellent text that includes current information on all aspects of vestibular assessment and management.Page: 971DOI: 10.1097/AUD.0b013e3181852704Authors: Branski, Ryan C.; Peck, Kyung K. (Source: Ear and Hearing... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929923 Tue, 04 Nov 2008 11:47:03 +0100 1929923 http://www.medworm.com/index.php?rid=1929922&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00013.htm The present study investigated whether Chinese-speaking cochlear implant users' speech performance via clinically assigned processors is correlated with temporal processing capabilities. Amplitude modulation detection thresholds (AMDTs) and modulation frequency discrimination thresholds (AMFDTs) were measured for low-frequency amplitude envelopes (20 or 50 Hz) and periodicity fluctuations (100 Hz) on a middle electrode at different stimulation levels that spanned the dynamic range. Results showed that both mean AMDTs and mean AMFDTs were significantly correlated with tone, consonant, and sentence recognition scores, but not with vowel recognition scores, which demonstrates the importance of temporal processing to cochlear implant Chinese speech recognition.Page: 957DOI: 10.1097/AUD.0b013e3... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929922 Tue, 04 Nov 2008 11:47:03 +0100 1929922 http://www.medworm.com/index.php?rid=1929921&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00012.htm This study demonstrated the additional effect of anxiety and depression in impairing general health-related and tinnitus-specific quality of life and effectiveness of coping. These results underline the need for investigating and treating both anxiety and depression symptoms in tinnitus patients.Page: 947DOI: 10.1097/AUD.0b013e3181888f83Authors: Bartels, H 1; Middel, B L. 2,3; van der Laan, B F. A. M. 1; Staal, M J. 4; Albers, F W. J. 5 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929921 Tue, 04 Nov 2008 11:47:03 +0100 1929921 http://www.medworm.com/index.php?rid=1929920&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00011.htm Galvanic stimulation using the intensity of 5 mA with the duration of 1 ms can reliably elicit galvanic vestibular-evoked myogenic potential (g-VEMP) responses with response rates and amplitudes comparable with those elicited by click stimulation without exceeding subject pain tolerances. More intense stimuli exceeded pain tolerances. Stimuli less than 3 to 5 mA demonstrated reduced amplitudes and lower response rates. Hence, galvanic stimulation at 5 mA/1 ms may be the preferred stimulation mode for evoking g-VEMPs.Page: 942DOI: 10.1097/AUD.0b013e31818713c3Authors: Cheng, Po-Wen 1,2; Yang, Chiao-Sen 1; Huang, Tsung-Wei 1; Young, Yi-Ho 3 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929920 Tue, 04 Nov 2008 11:47:03 +0100 1929920 http://www.medworm.com/index.php?rid=1929919&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00010.htm This study showed bilateral benefits (both subjectively and objectively), but it turned out to be impossible to predict bilateral benefit from a-priori audiologic information.Page: 930DOI: 10.1097/AUD.0b013e31818713a8Authors: Boymans, Monique 1; Theo Goverts, S 2; Kramer, Sophia E. 2; Festen, Joost M. 2; Dreschler, Wouter A. 1 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929919 Tue, 04 Nov 2008 11:47:03 +0100 1929919 http://www.medworm.com/index.php?rid=1929918&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00009.htm This study concludes that the adult range of VEMP latencies can be anticipated if neck length is >15.3 cm.Page: 923DOI: 10.1097/AUD.0b013e3181853019Authors: Wang, Shou-Jen 1,2; Yeh, Te-Huei 3; Chang, Chun-Hsiang 3; Young, Yi-Ho 3 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929918 Tue, 04 Nov 2008 11:47:03 +0100 1929918 http://www.medworm.com/index.php?rid=1929917&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00008.htm Wide-bandwidth recordings of conversational speech were obtained from a sample of male and female talkers and used to determine the mean spectral shape over a wide frequency range, and the distribution of levels as a function of center frequency. The speech levels at high frequencies were compared with absolute thresholds of 31 people selected to have mild or moderate cochlear hearing loss for frequencies up to 4 kHz, with greater losses at high frequencies. It is concluded that, to partially restore audibility for a hearing loss of 65 dB at 10 kHz would require an effective insertion gain of about 36 dB at 10 kHz.Page: 907DOI: 10.1097/AUD.0b013e31818246f6Authors: Moore, Brian C. J. 1; Stone, Michael A. 1; Fullgrabe, Christian 1; Glasberg, Brian R. 1; Puria, Sunil 2,3 (Source: Ear and Hear... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929917 Tue, 04 Nov 2008 11:47:03 +0100 1929917 http://www.medworm.com/index.php?rid=1929916&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00007.htm Tympanometric criteria for ventilation tube patency or perforation were derived on 268 left and 273 right ears of 3¾- to 7¼-years olds. Using otoscopy as comparator to define appropriate cutoffs, the number of errors coding patent VTs as nonpatent was traded against the opposite error type, as a function of volume (Veq). Three alternative Veq cutoffs resulted: 0.95 mL (representing equal error), 1.10 mL (equal cost) and 1.33 mL (minimum combined error), mean Veq ≥1.13 mL. Gender, but not age influenced these values. Cutoffs for pre- and postintervention Veq difference were 0.23, 0.44, and 0.39 mL, respectively, with mean 0.35 mL.Page: 894DOI: 10.1097/AUD.0b013e3181824d15Authors: MRC Multicentre Otitis Media Study Group (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929916 Tue, 04 Nov 2008 11:47:03 +0100 1929916 http://www.medworm.com/index.php?rid=1929915&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00006.htm This study describes the relationship between ototoxic-induced behavioral threshold and distortion-product otoacoustic emission (DPOAE) changes in patients with pre-existing hearing loss. Ears with confirmed ototoxic-induced behavioral threshold shifts were examined to determine which factors were associated with DPOAE sensitivity. A model for predicting DPOAE sensitivity is proposed. Ears successfully monitored for ototoxicity with DPOAEs are those with better pre-exposure hearing, greater postexposure hearing changes, and DPOAEs near the highest behavioral test frequencies and present at high f2's. DPOAE sensitivity may be predicted clinically by assessing the measurable DPOAE f2 frequency range and its relation to the highest behavioral test frequencies.Page: 875DOI: 10.1097/AUD.... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929915 Tue, 04 Nov 2008 11:47:03 +0100 1929915 http://www.medworm.com/index.php?rid=1929914&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00005.htm Hearing difficulties in the elderly often stem from aging of both the ear and the brain. A direct comparison of the rate of age-changes in hearing tests in a group of 241 cognitively normal seniors aged 71 to 96 showed more rapid deterioration in central auditory function than in peripheral auditory function. These findings indicate the importance of central auditory function and suggest that tests of central auditory function be performed routinely in people over the age of 70 who seek assistance because of hearing loss, and that rehabilitative measures not be confined to the peripheral part of the auditory system.Page: 865DOI: 10.1097/AUD.0b013e318181adb5Authors: Gates, George A. 1; Feeney, M Patrick 1; Mills, David 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929914 Tue, 04 Nov 2008 11:47:03 +0100 1929914 http://www.medworm.com/index.php?rid=1929913&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00004.htm Electrophysiological spread of neural excitation (SOE) and pitch perception using dual and single electrodes was investigated in nine subjects using the Nucleus® Freedom™ cochlear implant. Dual electrodes are produced by electrically coupling two adjacent single electrodes. The dual and single electrodes SOEs were similar in shape. Higher electrophysiological response amplitudes were generally found for the dual electrodes. There were no differences in SOE widths between dual and single electrodes. In three quarters of cases, dual and single electrodes were successfully pitch ranked in the expected tonotopic order. No significant relationships between pitch ranking and the SOE functions were found.Page: 853DOI: 10.1097/AUD.0b013e318181a878Authors: Busby, Peter A. 1; Battmer, ... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929913 Tue, 04 Nov 2008 11:47:03 +0100 1929913 http://www.medworm.com/index.php?rid=1929912&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00003.htm This study evaluated the influence of features of Automatic Speech Recognition (ASR) output on the benefit obtained from the text during speech comprehension. Listeners performed auditory-alone speech reception threshold (SRT) tests (presenting sentences auditorily), and audiovisual SRT tests (also presenting the text). ASR features such as the provision of words versus speech sounds (phones), accuracy level, and the timing of the text were examined. Results showed that more benefit was obtained from word output than from phone output. Presenting ASR confidence levels did not influence the benefit. Delaying the text moderately decreased the benefit and more benefit was obtained from ASR output with higher accuracy levels. Overall, ASR output increases speech comprehension.Page: 838DOI: 10.... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929912 Tue, 04 Nov 2008 11:47:03 +0100 1929912 http://www.medworm.com/index.php?rid=1929911&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00002.htm Is hearing loss after cisplatin therapy symmetric? We compared pure tone hearing thresholds, TEOAE levels and DPOAE levels of 55 children (34 m, 21 f) before and after chemotherapy with cisplatin. After therapy, the 55 children showed slightly higher average hearing levels in the range 2000 to 8000 Hz in the left ear. The side difference was significant at 4000, 6000, and 8000 Hz. In girls, the effect was less pronounced than in boys. This result underscores the need for further research into the pathophysiology of platinum ototoxicity.Page: 830DOI: 10.1097/AUD.0b013e31818005a4Authors: Schmidt, Claus-Michael; Knief, Arne; Lagosch, Agatha Katharina; Deuster, Dirk; am Zehnhoff-Dinnesen, Antoinette (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929911 Tue, 04 Nov 2008 11:47:03 +0100 1929911 http://www.medworm.com/index.php?rid=1929910&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200812000-00001.htm The auditory cortex shows plastic changes throughout life. Those that occur during maturation are typically considered the most profound and long lasting. Here plasticity is beneficial as it allows adaptation to behaviorally important sound and adapts easily to changes induced by deafness and subsequent application of hearing aids or cochlear implants. In children and adults, changes in cortical representation of frequency can occur after hearing loss, but may be accompanied by unpleasant side effects such as tinnitus. The acoustic environment may have, so far largely unnoticed, effects on cortical representations in the absence of hearing loss.Page: 819DOI: 10.1097/AUD.0b013e3181853030Authors: Eggermont, Jos J. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1929910 Tue, 04 Nov 2008 00:32:08 +0100 1929910 http://www.medworm.com/index.php?rid=1879651&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00006.htm We hypothesized that the fluctuating hearing loss associated with chronic otitis media with effusion (OME) early in development impacts the frequency weighting of speech. Eleven school-aged children with a history of OME were tested 1 to 2 wks after placement of tympanostomy tubes, and their performance was compared with that of 21 control children. The frequency content of Bamford-Kowal-Bench sentences was manipulated to determine the relative importance of cues in the regions of 1, 2, and 4 kHz. Results indicated that children with an OME history gave more weight to speech frequencies in the region of 2000 Hz compared with age-matched controls.Page: 718DOI: 10.1097/AUD.0b013e31817a98cbAuthors: Eapen, Rose J.; Buss, Emily; Grose, John H.; Drake, Amelia F.; Dev, Madhu; Hall, Joseph W. (Sou... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1879651 Thu, 16 Oct 2008 10:46:15 +0100 1879651 http://www.medworm.com/index.php?rid=1759414&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00016.htm Page: 817DOI: 10.1097/AUD.0b013e318186bea8 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759414 Thu, 04 Sep 2008 10:07:34 +0100 1759414 http://www.medworm.com/index.php?rid=1759413&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00015.htm Page: 816DOI: 10.1097/AUD.0b013e318186be96Authors: Clark, William W. Ph.D.; Bohl, Carl D. Sc.D. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759413 Thu, 04 Sep 2008 10:07:34 +0100 1759413 http://www.medworm.com/index.php?rid=1759412&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00014.htm Page: 815DOI: 10.1097/AUD.0b013e318186be60Authors: Ryals, Brenda M. Ph.D.; Svirsky, Mario A. Ph.D. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759412 Thu, 04 Sep 2008 10:07:34 +0100 1759412 http://www.medworm.com/index.php?rid=1759411&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00013.htm Page: 814DOI: 10.1097/AUD.0b013e3181850ec (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759411 Thu, 04 Sep 2008 10:07:34 +0100 1759411 http://www.medworm.com/index.php?rid=1759410&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00012.htm The ability of listeners to identify consonants on the basis of primarily temporal information was compared with the predictions of a model based on amplitude modulation spectra. Listeners and model were presented with phonemes processed so that one to eight bands of spectral information remained. The similarity of the modulation spectra across phonemes was a strong predictor of the confusions made by human listeners, suggesting that a sparse set of time-averaged patterns of modulation energy can capture a meaningful aspect of the information listeners use to distinguish among speech signals.Page: 800DOI: 10.1097/AUD.0b013e31817e73efAuthors: Gallun, Frederick 1; Souza, Pamela 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759410 Thu, 04 Sep 2008 10:07:34 +0100 1759410 http://www.medworm.com/index.php?rid=1759409&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00011.htm The purpose of this study was to 1)determine the prevalence of personal music system use in young adults; and 2) measure the dB SPL in the ear canal of a small sample of these adults. The Personal Music System Use Survey was completed by over 1000 undergraduate students; over 90% reported using a personal music system with earphones and almost 90% reported listening at either a medium or loud volume. Mean dB SPL for the medium and loud volume categories were 71.6 and 87.7, respectively. These data demonstrate the impact this noise exposure may have on hearing.Page: 791DOI: 10.1097/AUD.0b013e31817e7409Authors: Torre, Peter III (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759409 Thu, 04 Sep 2008 10:07:34 +0100 1759409 http://www.medworm.com/index.php?rid=1759408&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00010.htm In this study, a large 160-item test of environmental sound perception was developed and used to examine whether auditory training improves listeners' identification of environmental sounds processed by an acoustically simulated cochlear implant. Seven normal-hearing listeners identified spectrally-degraded stimuli obtained with a four-channel noise-based vocoder before and after five training sessions. Identification performance improved after training, mostly for the sounds included in the training set, but also, to a lesser extent, for untrained sounds. Results provide preliminary basis for incorporating environmental sounds into cochlear implant rehabilitation programs.Page: 775DOI: 10.1097/AUD.0b013e31817e08eaAuthors: Shafiro, Valeriy (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759408 Thu, 04 Sep 2008 10:07:34 +0100 1759408 http://www.medworm.com/index.php?rid=1759407&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00009.htm We examined the hypothesis that a natural auditory psychophysical discontinuity contributes to a perceptual category boundary between voiced-voiceless English stop consonants. Voice onset time (VOT) phonetic boundary and gap-detection thresholds for conditions in which the sounds delimiting the gap were acoustically identical or different were examined in English speakers. Statistically significant positive correlations and predictive linear relations were found between VOT phonetic boundaries and between-channel gap thresholds but not within-channel gap thresholds. Detection of gaps between different nonspeech acoustic markers and categorical perception of VOT seems to share the same underlying perceptual timing mechanisms in English speakers.Page: 761DOI: 10.1097/AUD.0b013e318185ddd2Auth... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759407 Thu, 04 Sep 2008 10:07:34 +0100 1759407 http://www.medworm.com/index.php?rid=1759406&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00008.htm This study examined age-related differences in listening to speech in music. In the first experiment, word identification accuracy was assessed in different background conditions (music or multitalker babble). In the second experiment, recognition recall was measured for background music heard during a word identification task. For older adults, word identification did not depend on the type of background, but for younger adults word identification was better when the background was familiar music than when it was unfamiliar music or babble. The pattern of false alarms in recognition suggested that younger listeners consciously processed the background music more than older listeners.Page: 746DOI: 10.1097/AUD.0b013e31817bdd1fAuthors: Russo, Frank A. 1; Pichora-Fuller, M Kathleen 2,3 (Sourc... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759406 Thu, 04 Sep 2008 10:07:34 +0100 1759406 http://www.medworm.com/index.php?rid=1759405&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00007.htm The purpose of this study was to investigate how young normal hearing (YNH) and elderly hearing-impaired (EHI) listeners make use of three redundant speech-like cues when classifying nonspeech sounds. Before the classification task, two experiments were conducted to verify the perceptual independence of the cues and to establish that each cue was easily discriminable for all the listeners. During the classification task, both YNH and EHI groups attended primarily to the frequency-transition cue. The EHI listeners required more time to learn to categorize the stimuli, and to change their focus of attention from preferred to alternate stimulus cues.Page: 725DOI: 10.1097/AUD.0b013e31817bdd42Authors: Wang, Xin; Humes, Larry E. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759405 Thu, 04 Sep 2008 10:07:34 +0100 1759405 http://www.medworm.com/index.php?rid=1759404&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00006.htm We hypothesized that the fluctuating hearing loss associated with chronic otitis media with effusion (OME) early in development impacts the frequency weighting of speech. Eleven school-aged children with a history of OME were tested 1 to 2 wks after placement of tympanostomy tubes, and their performance was compared with that of 21 control children. The frequency content of Bamford-Kowal-Bench sentences was manipulated to determine the relative importance of cues in the regions of 1, 2, and 4 kHz. Results indicated that children with an OME history gave more weight to speech frequencies in the region of 2000 Hz compared with age-matched controls.Page: 718DOI: 10.1097/AUD.0b013e31817a98cbAuthors: Eapen, Rose J.; Buss, Emily; Grose, John H.; Drake, Amelia F.; Dev, Madhu; Hall, Joseph W. (Sou... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759404 Thu, 04 Sep 2008 10:07:34 +0100 1759404 http://www.medworm.com/index.php?rid=1759403&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00005.htm Electrically evoked, auditory potentials were measured from Nucleus cochlear implant users. The speech processor was bypassed and the implanted electronics were controlled directly. A 600 ms train of biphasic current pulses was presented. In experimental conditions, the stimulus train included a change in the stimulating electrode position. The amplitude of the responses that were elicited by this change in electrode location tended to increase as the distance between the two stimulating electrodes increased. These results suggest that it may be feasible to use electrophysiologic techniques to assess sensitivity to change in various aspects of an ongoing electrical stimulus.Page: 704DOI: 10.1097/AUD.0b013e31817a98afAuthors: Brown, Carolyn J. 1,2; Etler, Christine 2; He, Shuman 1,2; O'Brien... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759403 Thu, 04 Sep 2008 10:07:34 +0100 1759403 http://www.medworm.com/index.php?rid=1759402&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00004.htm A loudness trisection method of measuring individual loudness functions from loudness judgments was tested on 9 normal-hearing subjects over the 40-80 dB SPL range. The average difference between these data and the loudness function defined by the accepted equations relating loudness and SPL for normal listeners (e.g. ANSI Standard S3.20-1973) was 0.78 dB ignoring sign; the standard deviation of the measurements was approximately 1 dB, compared to 6-8 dB in other studies. This may prove useful as a tool for selecting compression ratios for hearing aids on an individual basis; something impractical with previous methods because of the uncertainty of the judgments.Page: 693DOI: 10.1097/AUD.0b013e318177d9c6Authors: Villchur, Edgar 1; Killion, Mead C. 2,3 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759402 Thu, 04 Sep 2008 10:07:34 +0100 1759402 http://www.medworm.com/index.php?rid=1759401&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00003.htm We interviewed a large general population birth cohort about tinnitus, and assessed their personalities using the Multidimensional Personality Questionnaire. People with tinnitus were more socially withdrawn, stress reactive, alienated, and less Self-Controlled than those without. Amongst people who reported tinnitus, those who were more socially withdrawn, stress reactive, and alienated found their tinnitus more distressing. Our interpretation of the findings rests on the notion that percepts are probabilistic phenomena, and that personality factors may thus influence one's awareness of the perceptual features of tinnitus. If this is so, treatments which foster personality change may be effective in controlling tinnitus symptoms.Page: 684DOI: 10.1097/AUD.0b013e318177d9acAuthors: We... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759401 Thu, 04 Sep 2008 10:07:34 +0100 1759401 http://www.medworm.com/index.php?rid=1759400&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00002.htm This study investigated the consequences of presenting binaural stimuli to mismatched frequency regions in normal-hearing listeners. Temporal envelopes were manipulated to present low frequency timing cues to high frequency auditory channels, and interaural time discrimination thresholds were measured. Sensitivity improved with increasing presentation level, and carrier frequency mismatches reduced sensitivity. These results are interpreted in terms of spread of excitation into binaurally matched auditory channels. It is suggested that spatial hearing in listeners with bilateral cochlear implants could benefit from spread of current that results in the stimulation of neural populations that share common tonotopic space bilaterally.Page: 674DOI: 10.1097/AUD.0b013e3181775e03Authors: Blanks, ... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759400 Thu, 04 Sep 2008 10:07:34 +0100 1759400 http://www.medworm.com/index.php?rid=1759399&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200810000-00001.htm To clarify the contribution of the skull contents to the transmission of bone vibratory stimuli, we compared auditory thresholds and DPOAE levels with a bone vibrator placed on various sites of the head. The best audiometric thresholds and DPOAE levels were obtained from the mastoid and the temple. The audiometric thresholds from the eye were similar to those of the forehead and about 10 dB higher than at the best sites. DPOAEs were clearly present when elicited by a combination of air-conducted stimuli and with the bone vibrator placed on the eye. These results indicate that vibratory sounds can be transmitted through the skull contents to the inner ear.Page: 667DOI: 10.1097/AUD.0b013e3181775ddeAuthors: Watanabe, Tomoo; Bertoli, Sibylle; Probst, Rudolf (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1759399 Wed, 03 Sep 2008 23:59:53 +0100 1759399 http://www.medworm.com/index.php?rid=1575251&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00015.htm This work aims to quantify variations in energy reflectance (ER) measurements among normal ears. ER measurements were made on nine human-cadaver ears to study three variables: (1) ear-canal measurement location, (2) ear-canal area, and (3) middle-ear cavity volume. ER depends on all variables studied. Variations within an individual ear in either measurement location or ear-canal cross-sectional area result in relatively small effects on the ER, and variations in cavity volume produce much larger effects in ER, possibly explaining some of the inter-subject variation in ER reported among normal ears.Page: 651DOI: 10.1097/AUD.0b013e318174f07cAuthors: Voss, Susan E. 1; Horton, Nicholas J. 2; Woodbury, Rebecca R. 1; Sheffield, Kathryn N. 1 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575251 Fri, 04 Jul 2008 08:04:00 +0100 1575251 http://www.medworm.com/index.php?rid=1575250&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00014.htm This study compared a variety of detection paradigms that differed with regard to a fixed or variable recording length, the significance level, the averaging procedure, the minimum number of recorded sweeps and the required number of consecutive significant sweeps to accept a response. It has shown that even minor changes in the detection paradigm may have a major influence on the error rate. Moreover, the detection rate and the recording time of ASSRs, and consequently the ASSR thresholds are affected. Well-considered choices need to be made with regard to the objective detection of responses.Page: 638DOI: 10.1097/AUD.0b013e318174f051Authors: Luts, Heleen 1; Van Dun, Bram 1,2; Alaerts, Jane 1; Wouters, Jan 1 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575250 Fri, 04 Jul 2008 08:04:00 +0100 1575250 http://www.medworm.com/index.php?rid=1575249&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00013.htm Congenitally deaf children may reach the milestones of speech and language development at normal ages if fitted very early with a cochlear implant. This longitudinal study is the first to show that implantation before 20 months of age also leads to normal quality of babbling, both at the segmental and the intrasyllabic level. However, small differences were found with hearing peers at the very subtle and complex intersyllabic variegations of consonants. It is anticipated that this will not influence the later quality of the lexical development.Page: 627DOI: 10.1097/AUD.0b013e318174f03cAuthors: Schauwers, Karen 1,2; Gillis, Steven 1; Govaerts, Paul J. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575249 Fri, 04 Jul 2008 08:04:00 +0100 1575249 http://www.medworm.com/index.php?rid=1575248&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00012.htm The purpose of this study was to explore the use of the Montreal Battery for Evaluation of Amusia (MBEA) test to assess the music perception abilities of cochlear implant (CI) users. The MBEA was used to measure six different aspects of music perception (Scale, Contour, Interval, Rhythm, Meter, and Melody Memory) by CI users and normal hearing (NH) listeners presented with vocoded stimuli. Results showed that CI users and NH listeners performed higher on rhythmic-based tests (Rhythm and Meter) than on pitch-based tests (Scale, Contour, and Interval). The CI scores matched to the 4-6-channel scores from NH listeners.Page: 618DOI: 10.1097/AUD.0b013e318174e787Authors: Cooper, William B. 1; Tobey, Emily 1; Loizou, Philipos C. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575248 Fri, 04 Jul 2008 08:04:00 +0100 1575248 http://www.medworm.com/index.php?rid=1575247&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00011.htm Open canal fittings are often used for patients with near-normal low-frequency hearing. The effect of mixing the air-borne sound and the amplified but delayed sound was explored by simulating the effects of a hearing loss and a hearing aid programmed to compensate for that loss, and using normal-hearing participants to assess the subjective disturbance of the delay. Ratings just below a value corresponding to disturbing were reached for delays of about 5 and 6 ms, for simulated hearing losses starting at 2 and 1 kHz, respectively. The perceptual effect of reducing the spectral ripples produced by comb-filtering was small.Page: 601DOI: 10.1097/AUD.0b013e3181734ef2Authors: Stone, Michael A. 1; Moore, Brian C. J. 1; Meisenbacher, Katrin 1; Derleth, Ralph P. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575247 Fri, 04 Jul 2008 08:04:00 +0100 1575247 http://www.medworm.com/index.php?rid=1575246&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00010.htm The caloric test is a mainstay of modern vestibular assessment. Yet caloric test methods have not been well standardized and normal response values have not been universally agreed upon. The air caloric test has been particularly problematic. In this paper, we present our efforts to establish a population-based description of the caloric response evoked by water and air stimuli at both cool and warm temperatures.Page: 585DOI: 10.1097/AUD.0b013e3181734ed0Authors: Zapala, David A.; Olsholt, Ketil F.; Lundy, Larry B. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575246 Fri, 04 Jul 2008 08:04:00 +0100 1575246 http://www.medworm.com/index.php?rid=1575245&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00009.htm In this study, we tested hearing thresholds using pure tone audiometry and used a forced choice questionnaire to determine the nature of family history in individuals aged 50 years or older in a defined region in Australia. We found a strong association between maternal family history of hearing loss and moderate to severe hearing loss in women and a significant, but less strong, association between paternal family history and moderate-severe hearing loss in men.Page: 578DOI: 10.1097/AUD.0b013e31817349d6Authors: McMahon, Catherine M. 1; Kifley, Annette 2; Rochtchina, Elena 2; Newall, Philip 1; Mitchell, Paul 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575245 Fri, 04 Jul 2008 08:04:00 +0100 1575245 http://www.medworm.com/index.php?rid=1575244&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00008.htm The relative contribution of occupational noise was estimated using a population model of hearing loss that was manipulated to either include or exclude noise exposure. It appears likely that occupational noise accounts for only 5-10% of the burden of adult hearing loss in the USA. Most of this burden is attributable to unprotected exposures above 95 dBA, and becomes apparent in middle age, when age-related threshold shifts are added to prior noise-induced shifts. Stricter enforcement of existing regulations could reduce this burden.Page: 565DOI: 10.1097/AUD.0b013e31817349ecAuthors: Dobie, Robert A. 1 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575244 Fri, 04 Jul 2008 08:04:00 +0100 1575244 http://www.medworm.com/index.php?rid=1575243&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00007.htm The aging of the population results in growing numbers of hearing-impaired persons seeking help, increasing costs as well as delays in hearing aid provision. As a result, direct hearing aid provision by private dispensers has gained attention. In a discrete choice experiment we elicited patient preferences for transferring elements of hearing aid provision from the medical sector to private dispensers. Hearingimpaired persons were receptive to transferring elements of hearing aid provision. Although safety and efficiency should also be considered, we can conclude that in the organization of hearing aid provision hearing-impaired persons prefer an initial assessment at a private dispenser when the dispenser is sufficiently accurate, followed by a control visit at the ENT-specialist.Page: 55... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575243 Fri, 04 Jul 2008 08:04:00 +0100 1575243 http://www.medworm.com/index.php?rid=1575242&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00006.htm The objective of this study was to predict consonant recognition scores of adults and children with/without hearing impairment. A consonant recognition test was administered across signal to noise ratios. Three groups of listeners participated: adults and children with normal hearing, and children with hearing loss. The Speech Intelligibility Index was computed for each listener and test condition, and transfer functions were fitted to the data of each group. The adult-derived transfer function over-predicted the children's scores. Significant increases in prediction accuracy were obtained when the effects of age and hearing loss were incorporated into the transfer function as proficiency factors.Page: 543DOI: 10.1097/AUD.0b013e3181734a02Authors: Scollie, Susan D. (Source: Ear and H... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575242 Fri, 04 Jul 2008 08:04:00 +0100 1575242 http://www.medworm.com/index.php?rid=1575241&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00005.htm The goal of this study in infants and young children was to determine how transient-evoked otoacoustic emission (TEOAE) levels were different when tympanometric peak pressures (TPP) measured from tympanograms were normal versus negative in the same individual. The study also determined if TEOAE screening pass rates using a priori pass criteria were affected on days when tympanometric peak pressure was negative. Mean TEOAE levels were lower in all frequency bands from 1000-4000 Hz and no significant differences were found among the mean reduction across frequency bands. There were no significant differences in the percentage of passes between TEOAEs collected on days when TPP was normal and when TPP was negative.Page: 533DOI: 10.1097/AUD.0b013e3181731e3eAuthors: Prieve, Beth A. 1; Calandruc... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575241 Fri, 04 Jul 2008 08:04:00 +0100 1575241 http://www.medworm.com/index.php?rid=1575240&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00004.htm This report describes distributions of hearing loss configuration, severity, and site of lesion, obtained from a large clinical database of audiograms analyzed by AMCLASS™, a validated method for classifying audiograms. The most prevalent types were sloping configuration, mild and moderate severities, and sensorineural site of lesion. One third of all ears had normal hearing and 25% of patients had normal hearing in both ears. The results may be useful for comparing clinical groups and for counseling patients regarding the relationship of their hearing loss to that of a large population.Page: 524DOI: 10.1097/AUD.0b013e3181731e2eAuthors: Margolis, Robert H. 1,2; Saly, George L. 2,3 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575240 Fri, 04 Jul 2008 08:04:00 +0100 1575240 http://www.medworm.com/index.php?rid=1575239&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00003.htm This study described changes in the DP-gram during an age continuum spanning the preterm period and first six months of postnatal life. DP-grams were recorded from 290 premature and term born infants and 48 adults using typical clinical parameters. Infant DPOAE levels were 4-12 dB higher than adult responses. Levels increased throughout the preterm period and generally decreased as f2 frequency increased. A shallow trough configuration was often evident. In contrast, during postnatal life, DPOAE level changed little as a function of age and was relatively flat across frequency. Clinical implications and possible sources of the age effects are discussed.Page: 512DOI: 10.1097/AUD.0b013e31816c40bbAuthors: Abdala, Carolina 1; Oba, Sandra I. 1; Ramanathan, Rangasamy 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575239 Fri, 04 Jul 2008 08:04:00 +0100 1575239 http://www.medworm.com/index.php?rid=1575238&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00002.htm This study examined the effect of age at implantation on speech perception and language development in deaf children who received cochlear implants in the first four years of life, including a small group implanted in the first year. Potential pitfalls of very early implantation, such as anesthetic risk and mistaken diagnosis of profound deafness, are discussed. In general, outcomes were better for earlier implanted children but the additional benefits of implantation in the first year of life rather than later were modest. Finally, the results support the existence of a sensitive period for the development of spoken language during the first four years of life.Page: 492DOI: 10.1097/AUD.0b013e31816c409fAuthors: Holt, Rachael Frush 1; Svirsky, Mario A. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575238 Fri, 04 Jul 2008 08:04:00 +0100 1575238 http://www.medworm.com/index.php?rid=1575237&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200808000-00001.htm The PI function shows the cumulative distribution of speech information across amplitude, as speech rises from inaudibility to full audibility. It can be modeled by a cubed exponential function with three parameters representing threshold, slope, and maximum performance. Phoneme scoring of responses to consonantvowel- consonant words makes it possible to obtain complete PI functions in a reasonably short time with acceptable test-retest reliability. In clinical applications, the function provides valuable information over and above that which would be obtained from measurement of SRT and PBMax alone. It is an easily available, but largely neglected resource for hearing research and clinical audiology.Page: 479DOI: 10.1097/AUD.0b013e318174f067Authors: Boothroyd, Arthur (Source: Ear and Hear... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1575237 Thu, 03 Jul 2008 23:34:35 +0100 1575237 http://www.medworm.com/index.php?rid=1417540&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00017.htm Page: 477DOI: 10.1097/AUD.0b013e31816a0d5cAuthors: Chapman, Robyn J. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417540 Sat, 03 May 2008 07:34:05 +0100 1417540 http://www.medworm.com/index.php?rid=1417539&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00016.htm Page: 476DOI: 10.1097/AUD.0b013e31816a0d7cAuthors: Sharma, Anu (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417539 Sat, 03 May 2008 07:34:05 +0100 1417539 http://www.medworm.com/index.php?rid=1417538&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00015.htm Three outstanding new texts on subjects including cochlear implants, auditory evoked potentials and auditory anatomy & physiology are reviewed in this issue. Anu Sharma describes Auditory Evoked Potentials: Basic Principles and Clinical Application (edited by Burkard, Don and Eggermont) as a comprehensive book that is a welcome addition to the resources in this area. According to Paul Abbas, Anatomy and Physiology of Hearing for Audiologists (by Clark & Ohlemiller) is well organized and well written and provides a wide range of material on the topic that is arranged in a logical sequence. Robyn Chapman reports that the second edition of Cochlear Implants (edited by Waltzman and Roland) is an excellent reference that includes information on all aspects of this rapidly growing ... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417538 Sat, 03 May 2008 07:34:05 +0100 1417538 http://www.medworm.com/index.php?rid=1417537&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00014.htm The purpose of this study is to examine the evidence for a cochlear, retrocochlear, or central site of lesion of deafness in two cochlear implant recipients with Kearns-Sayre Syndrome (KSS). The results obtained from speech perception data and electrically-evoked ABR (eABR) and middle latency responses (eMLR) are consistent with an initial site of cochlear lesion for deafness in KSS with relative sparing of the central auditory pathway early in the disease.Page: 472DOI: 10.1097/01.aud.0000310791.83193.62Authors: Pijl, Sipke 1; Westerberg, Brian D. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417537 Sat, 03 May 2008 07:34:05 +0100 1417537 http://www.medworm.com/index.php?rid=1417536&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00013.htm In this study, we compared the performance of these children, who we term 'disproportionate language impairment' (DLI), with a carefully, case-controlled matched sample. Performance of each group on a test battery used to identify specific language impairment (SLI) in normally hearing children revealed significant differences between the DLI and Control children. We suggest that the DLI experienced by some CI using children may be additional to their deafness, reflecting the same, predominantly inherited basis as SLI.Page: 467DOI: 10.1097/AUD.0b013e318167b857Authors: Hawker, Kelvin 1; Ramirez-Inscoe, Jayne 1,2; Bishop, Dorothy V. M. 3; Twomey, Tracey 1; O'Donoghue, Gerard M. 1; Moore, David R. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417536 Sat, 03 May 2008 07:34:05 +0100 1417536 http://www.medworm.com/index.php?rid=1417535&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00012.htm To avoid testing a large number of children in each clinical test site in order to establish soundfield norms for the Canadian French Hearing in Noise Test (HINT), the use of correction factors has been proposed and validated in this study. Speech reception thresholds (SRT) for sentences were measured in native French-speaking subjects of various age groups, and correction factors were calculated by comparing performance in each age group to adult performance. SRTs decreased with age to reach adult values in 12-year olds. The correction factors were effective in predicting mean SRTs for a previously untested age group in all HINT conditions apart from the quiet condition.Page: 453DOI: 10.1097/01.aud.0000310792.55221.0cAuthors: Vaillancourt, Veronique 1; Laroche, Chantal 1; Giguere, Christi... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417535 Sat, 03 May 2008 07:34:05 +0100 1417535 http://www.medworm.com/index.php?rid=1417534&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00011.htm The primary goal of this study was to determine if forward-masking (FM) patterns obtained with the electrically evoked compound action potential (ECAP) are predictive of psychophysical forward-masking (PFM) patterns in cochlear implant (CI) recipients. Results from 18 adult CI users showed ECAP FM and PFM patterns correlated well for two-thirds of the subjects. Although the group correlation was statistically significant, ECAP FM patterns only accounted for 30% of the variance in the PFM measures. This suggests that the ECAP measures alone are not sufficient for accurately predicting PFM patterns for individual subjects.Page: 435DOI: 10.1097/AUD.0b013e31816a0d3dAuthors: Hughes, Michelle L.; Stille, Lisa J. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417534 Sat, 03 May 2008 07:34:05 +0100 1417534 http://www.medworm.com/index.php?rid=1417533&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00010.htm This study compared the music perception skills of adult cochlear implant (CI) users to hearing aid (HA) users who have similar levels of hearing impairment. The HA group performed significantly better than the CI group on the pitch and melody tests. There was no difference between the groups in the instrument identification or rhythm tests. The results suggest that although HA users with similar levels of hearing loss perform at least equal to, if not better than, CI users on these music tests, neither group was able to achieve accurate or effective music perception, regardless of the device they used.Page: 421DOI: 10.1097/AUD.0b013e31816a0d0bAuthors: Looi, Valerie 1,2,3; McDermott, Hugh 1; McKay, Colette 1,4; Hickson, Louise 5 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417533 Sat, 03 May 2008 07:34:05 +0100 1417533 http://www.medworm.com/index.php?rid=1417532&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00009.htm This study used a vocoder simulation of a cochlear implant processor to investigate the perception of familiar environmental sounds with varying spectral resolution. Normal-hearing listeners identified 60 environmental sounds in six spectral resolution conditions (i.e. 2-32 frequency channels). Overall, identification accuracy tended to improve with increasing spectral resolution, despite substantial variability among individual sounds. Cross-channel asynchrony, introduced during processing, had a minor negative effect on performance. Several simple acoustic characteristic of environmental sounds could accurately predict spectral resolution required for their identification, thus providing a preliminary basis for optimizing environmental sound perception by cochlear implant patients.Page: ... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417532 Sat, 03 May 2008 07:34:05 +0100 1417532 http://www.medworm.com/index.php?rid=1417531&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00008.htm This study evaluated the possibility of administering the test via the client's own hearing aid(s). While the aided version of the test led to a reduced incidence of inconclusive results, it also led to false positives. Hence, the aided version of the TEN test is not recommended for use in clinical practice.Page: 392DOI: 10.1097/AUD.0b013e3181690701Authors: Marriage, Josephine 1,2; Moore, Brian C. J. 1; Ogg, Vivian 3; Stone, Michael A. 1 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417531 Sat, 03 May 2008 07:34:05 +0100 1417531 http://www.medworm.com/index.php?rid=1417530&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00007.htm Test-retest repeatability of distortion product otoacoustic emissions (DPOAE) was measured in 80 normally hearing ears by means of triplicate measurements. Multiple conditions were applied and measurements were repeated with the ear probe remaining in place and with the ear probe re-positioned. Explicit evaluation of the results included 5 different statistical approaches. Test-retest repeatability was generally good. The current findings underline the suitability of DPOAE as a monitoring tool of cochlear status over time. The data can assist the clinician and the scientist in the correct interpretation of DPOAE level changes in the test-retest situation.Page: 378DOI: 10.1097/AUD.0b013e31816906e7Authors: Wagner, Wolfgang 1; Heppelmann, Guido 1; Vonthein, Reinhard 2; Zenner, Hans Peter 1 (S... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417530 Sat, 03 May 2008 07:34:05 +0100 1417530 http://www.medworm.com/index.php?rid=1417529&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00006.htm The purpose of this study was to determine whether transient-evoked otoacoustic emissions (TEOAEs) measured in a group of normal-hearing professional singers differed from those measured in age-and gender-matched normal-hearing non-singers. The normal-hearing professional singers were frequently exposed to high-level sound during rehearsals and performances, whereas the control group was assumed to have minimal exposure to such high-level sound. The findings suggest that while TEOAE responses were measureable in all normal hearing professional singers, responses were less robust than those of normal-hearing controls.Page: 360DOI: 10.1097/AUD.0b013e31816a0d1eAuthors: Hamdan, Abdul-Latif; Abouchacra, Kim S.; Zeki Al Hazzouri, Adina G.; Zaytoun, Georges (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417529 Sat, 03 May 2008 07:34:05 +0100 1417529 http://www.medworm.com/index.php?rid=1417528&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00005.htm The purpose of this investigation was to compare speech recognition and localization performance on subjects who wear bilateral cochlear implants (CICI) to subjects who wear a unilateral cochlear implant (true CI-Only) that were matched based upon age at implantation and duration of deafness. A comparison in performance between the CICI score and the true CI-Only score in quiet revealed a significant difference between the two groups with significantly greater benefit on words and sentences in quiet and localization for listeners using two cochlear implants over those using only one cochlear implant.Page: 352DOI: 10.1097/AUD.0b013e318167b870Authors: Dunn, Camille C. 1; Tyler, Richard S. 1; Oakley, Sarah 2; Gantz, Bruce J. 1; Noble, William 1,3 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417528 Sat, 03 May 2008 07:34:05 +0100 1417528 http://www.medworm.com/index.php?rid=1417527&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00004.htm This study examined the mastery of the production and perception of speech intonation contrasts in pediatric cochlear implant (CI) recipients and their age-matched peers with normal hearing (NH). Pediatric CI recipients' performance levels of intonation production and perception were both found to be significantly lower than the levels of their NH peers. Further, pediatric CI recipients' performance levels in intonation production and perception were moderately correlated. These findings suggest the importance of addressing both aspects (production and perception) of speech intonation in the aural rehabilitation and speech intervention programs for prelingually deafened children and young adults who use a CI.Page: 336DOI: 10.1097/AUD.0b013e318168d94dAuthors: Peng, Shu-Chen; T... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417527 Sat, 03 May 2008 07:34:05 +0100 1417527 http://www.medworm.com/index.php?rid=1417526&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00003.htm An artificial neural network was used to evaluate tone production of adult Mandarin-Chinese speakers. As few as 4 hidden neurons and 3 samples from the F0 contour were found to be sufficient for the neural network to achieve tone recognition of 85% correct. The performance was affected by across-speaker variations. A normalization procedure based on the height of Mandarin tone 1 improved the performance of the network to that of human listeners. The success of this normalization procedure warrants its use in the clinic and sheds light on how the auditory system normalizes tones produced by different speakers.Page: 326DOI: 10.1097/AUD.0b013e3181662c42Authors: Zhou, Ning 1; Zhang, Wenle 2; Lee, Chao-Yang 1; Xu, Li 1 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417526 Sat, 03 May 2008 07:34:05 +0100 1417526 http://www.medworm.com/index.php?rid=1417525&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00002.htm Auditory neuropathy is characterized by normal cochlear mechanical function but absent or severely disrupted synchronous neural activity. Because of the broad classification system used, AN may encompass multiple sites-of-lesion including inner hair cells, the primary afferent synapse or the auditory brainstem. By comparing frequency-specific electrocochleography (ECochG) waveforms before cochlear implantation with electrically-evoked auditory brainstem responses (EABR) measured after implantation, we demonstrate here that EcochG can be used to differentially diagnose pre-synaptic and post-synaptic types of auditory neuropathy. This has potential implications for the fitting of cochlear implants in individuals with AN.Page: 314DOI: 10.1097/AUD.0b013e3181662c2aAuthors: McMahon, Catherine M.... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417525 Sat, 03 May 2008 07:34:05 +0100 1417525 http://www.medworm.com/index.php?rid=1417524&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200806000-00001.htm This article provides an overview of event-related potentials elicited by speech stimuli, including the P1-N1-P2 complex, mismatch negativity, and P3. The focus is the application of these speech-evoked potentials for the assessment of (1) the effects of hearing loss on the neural encoding of speech allowing for behavioral detection and discrimination; (2) improvements in the neural processing of speech with amplification; and (3) the impact of auditory training on the neural processing of speech.Page: 285DOI: 10.1097/AUD.0b013e3181662c0eAuthors: Martin, Brett A. 1; Tremblay, Kelly L. 2; Korczak, Peggy 3 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1417524 Fri, 02 May 2008 23:55:56 +0100 1417524 http://www.medworm.com/index.php?rid=1275901&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00013.htm This study assesses audiological performances, satisfaction rate, and side effects of 100 patients using the middle ear implant Vibrant Soundbridge (VSB) for 5 to 8 years. The functional gain of the device remains unchanged over time. Despite a speech comprehension deterioration due to the natural history of the hearing loss, the VSB still provided an important benefit (81% in quiet for disyllabic words with the VSB compared to 37% without the VSB). The satisfaction rate remained stable (77% of patients satisfied). No adverse effect due to the device on the ossicular chain is reported. The incidence of side effects remained very low.Page: 281DOI: 10.1097/AUD.0b013e3181645366Authors: Mosnier, Isabelle 1,2,3,4; Sterkers, Olivier 1,2,3,4,5; Bouccara, Didier 1,3,4; Labassi, Samia 6; Bebear, Je... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275901 Tue, 04 Mar 2008 08:52:40 +0100 1275901 http://www.medworm.com/index.php?rid=1275900&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00012.htm Speech perception and production skill after 48 months of coclear implant (CI) use predicts later reading achievement in pediatric, prelingually deaf CI users. Regression analysis revealed that speech perception and production scores of 72 participants who had 48 months of CI experience explained 59% of the variance in the scores achieved on paragraph comprehension after the children had an average of 90 months of CI experience. The implication is that access to sound helps to build better phonological processing skills, which is one of the likely contributors to eventual reading success.Page: 270DOI: 10.1097/01.aud.0000305158.84403.f7Authors: Spencer, Linda J. 1; Oleson, Jacob J. 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275900 Tue, 04 Mar 2008 08:52:40 +0100 1275900 http://www.medworm.com/index.php?rid=1275899&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00011.htm Jervell and Lange-Nielsen syndrome (JNLS) is a rare, potentially fatal autosomal recessive disorder, characterized by congenital deafness and prolonged QT interval in the electrocardiogram (ECG). Patients with JLNS are prone to cardiac arrhythmias, syncope and sudden death. The purpose of this article is to increase the awareness of this rare disease, present our experience with eight cochlear implanted children with JLNS, and to emphasize the importance of ECG screening of congenitally deaf children. Cochlear implantation can be performed safely and with good results in children with JLNS, but requires knowledge of the diagnosis and that necessary precautions have to be taken.Page: 261DOI: 10.1097/AUD.0b013e3181645393Authors: Siem, Geir 1,2; Fruh, Andreas 3; Leren, Trond P. 4; Heimdal, Ke... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275899 Tue, 04 Mar 2008 08:52:40 +0100 1275899 http://www.medworm.com/index.php?rid=1275898&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00010.htm In this study, we compared the effects of Monopole, Tripole, and Virtual channel electrode configurations on spectral resolution and on speech perception using a crossover design in nine adults who received an Advanced Bionics CII/90K cochlear implant. Hybrid Tripolar configurations had to be used with current partly flowing to the extracochlear reference to enable sufficient loudness growth. Although spectral resolution improved slightly with the Tripolar configuration, the differences were small in this limited group of subjects. More efficient stimulation schemes are necessary for future testing of Tripolar stimulation benefits.Page: 250DOI: 10.1097/AUD.0b013e3181645336Authors: Berenstein, Carlo K. 1; Mens, Lucas H. M. 1; Mulder, Jef J. S. 1; Vanpoucke, Filiep J. 2 (Source: Ear and Hear... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275898 Tue, 04 Mar 2008 08:52:40 +0100 1275898 http://www.medworm.com/index.php?rid=1275897&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00009.htm Auditory event-related potentials were recorded in sound-field from ten prelingually deafened children with cochlear implants (CI) while actively performing oddball phonetic discrimination tasks. Tasks consisted of naturally-produced syllables that differed by one phonetic contrast: vowel place, voicing, vowel height, and place of articulation. With increasing acoustic-phonetic difficulty P3 latency and reaction time increased, whereas P3 amplitude and performance accuracy decreased, suggesting a similar hierarchy of acoustic-phonetic demand for both electrophysiological and behavioral measures. P3 was absent in four of the ten children, but only in the most difficult place of articulation task. These results underscore the significant value of the P3 potential as a sensitive cortical neur... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275897 Tue, 04 Mar 2008 08:52:40 +0100 1275897 http://www.medworm.com/index.php?rid=1275896&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00008.htm This study found enhanced gap detection for wide band stimuli in the right ear and for tonal stimuli in the left. Performance of subjects with congenital unilateral deafness does not show compensation for the processing advantages that would have been found in the deaf ear.Page: 228DOI: 10.1097/AUD.0b013e318164537bAuthors: Sininger, Yvonne S. 1; de Bode, Stella 2 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275896 Tue, 04 Mar 2008 08:52:40 +0100 1275896 http://www.medworm.com/index.php?rid=1275895&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00007.htm A laboratory study in 24 hearing aid users showed that the aid user is able to control important fitting parameters for different acoustic environments in a systematic way. Test-retest reproducibility allows significantly different settings for different individuals and for different acoustical situations. The results show an unexpectedly large impact of the starting condition (baseline) on the preferred frequency response. This finding implies that fine tuning in a traditional clinical setting may be biased. For fine-tuning of advanced signal processing the concept of a trainable hearing aid may facilitate a more direct approach to hearing aid fitting.Page: 214DOI: 10.1097/AUD.0b013e31816453a6Authors: Dreschler, Wouter A. 1; Keidser, Gitte 2; Convery, Elizabeth 2; Dillon, Harvey 2 (Source... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275895 Tue, 04 Mar 2008 08:52:40 +0100 1275895 http://www.medworm.com/index.php?rid=1275894&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00006.htm A strategy for selecting the preferred microphone mode based on a direct comparison between speech signals processed by either DIR or OMNI circuits is described. Differences between OMNI and DIR circuits were analyzed using a model of auditory processing that highlights the spectral and temporal dynamics of speech expressed in terms of a modified spectro-temporal modulation index (mSTMI). OMNI and DIR processed mSTMI values were compared to intelligibility measures and user preference judgments. Results showed that the mSTMI was able to capture both the directional benefit and user preference with a high degree of accuracy.Page: 199DOI: 10.1097/AUD.0b013e318164531fAuthors: Grant, Ken W. 1; Elhilali, Mounya 2; Shamma, Shihab A. 2; Walden, Brian E. 1; Surr, Rauna K. 1; Cord, Mary T. 1; Summe... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275894 Tue, 04 Mar 2008 08:52:40 +0100 1275894 http://www.medworm.com/index.php?rid=1275893&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00005.htm Infants consistently show ipsilateral/contralateral asymmetries in two-channel air- and bone-conduction auditory brainstem responses. These asymmetries help isolate which cochlea is the primary contributor to the response. We investigated whether similar ipsilateral/contralateral asymmetries are seen for brainstem (80-Hz) auditory steady-state responses (ASSRs). Two-channel ASSRs were recorded to multiple air- and bone-conduction stimuli in normal-hearing infants and adults. Infants had significantly more ipsilateral/ contralateral asymmetries compared to adults. We also estimated interaural attenuation for boneconducted stimuli to be at least 10 to 30 dB for most infants. These asymmetries in infant bone-conduction ASSRs may also be useful clinically for isolating the cochlea of origin.Pa... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275893 Tue, 04 Mar 2008 08:52:40 +0100 1275893 http://www.medworm.com/index.php?rid=1275892&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00004.htm The focus of this study was to substantiate the hypothesis that distortion-product otoacoustic emissions (DPOAEs) deteriorate with age independently of hearing sensitivity. We applied the stringent audiometric criterion that thresholds at any of five frequencies from 500 to 8000 Hz, did not exceed 15 dB HL, then evaluated 136 males and 195 females out of 2259 adults aged 40 to 82 years old. Multivariate analyses demonstrated a significant negative effect of age on DPOAE levels in both genders. Regarding pure-tone threshold, neither main nor interactive effect on DPOAE amplitude was statistically significant. We conclude that DPOAE measurements in audiometrically normal-hearing elderly may provide early indications of cochlear damage due to aging.Page: 176DOI: 10.1097/AUD.0b013e3181634eb8Au... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275892 Tue, 04 Mar 2008 08:52:40 +0100 1275892 http://www.medworm.com/index.php?rid=1275891&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00003.htm The Speech Reception Threshold (SRT) is traditionally measured in stationary noise with the long-term speech spectrum of the target speech (LTASS). However, in real life the instantaneous level or the spectrum of the background noise is likely to be different from stationary LTASS noise. SRTs were measured with normal-hearing listeners in real life background noises which vary in the temporal as well as spectral domain. With the aid of the Extended Speech Intelligibility Index model, the SRTs in real life noises can be predicted reasonably well for most observed SRTs.Page: 169DOI: 10.1097/AUD.0b013e31816476d4Authors: Rhebergen, Koenraad S.; Versfeld, Niek J.; Dreschler, Wouter A. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275891 Tue, 04 Mar 2008 08:52:40 +0100 1275891 http://www.medworm.com/index.php?rid=1275890&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00002.htm Tympanometric characteristics of Chinese school-aged children with normal middle ear function were investigated. Increasing age was accompanied by an increase in peak, compensated static acoustic admittance (Peak Ytm) and equivalent ear canal volume (Vec) values, a decrease in tympanometric width (TW) values, and less negative and less varied tympanometric peak pressure (TPP) values. These developmental changes are consistent with those found in white children in Western studies. Racial differences in Peak Ytm and TW values were noted, in that the Chinese school-aged children had a lower Peak Ytm limit and wider TW values than white children; these differences should be noted when evaluating Chinese school-aged children.Page: 158DOI: 10.1097/AUD.0b013e318164aa61Authors: Wong, Lena L. N.; A... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275890 Tue, 04 Mar 2008 08:52:40 +0100 1275890 http://www.medworm.com/index.php?rid=1275889&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200804000-00001.htm The objective of this study was to evaluate the response of the auditory cortex to the temporal amplitude envelope of speech. Event-related potentials were recorded to sentences in a group of young, normal-hearing listeners. Source waveforms in the posterior auditory cortices were cross-correlated with the low frequency log-envelope of each sentence. Significant correlations were detected for all sentences and for all but one of the participants, with the cortical response occurring approximately 180 ms after the stimulus. The results show that the human auditory cortex either directly follows the speech envelope or consistently reacts to changes in this envelope.Page: 139DOI: 10.1097/AUD.0b013e31816453dcAuthors: Aiken, Steven J.; Picton, Terence W. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1275889 Tue, 04 Mar 2008 00:53:20 +0100 1275889 http://www.medworm.com/index.php?rid=1120583&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00013.htm Resource Reviews return with this issue. The Hearing Loss and Prosthesis Simulator (HeLPS) [from Sensimetrics Corporation] is described by Joan Besing as an outstanding software package that is user friendly and likely to be an effective tool for practicing audiologists, faculty, students, and other individuals who interact with children and adults with hearing loss.Page: 134DOI: 10.1097/AUD.0b013e31815d63dcAuthors: Besing, Joan (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120583 Sat, 29 Dec 2007 01:27:53 +0100 1120583 http://www.medworm.com/index.php?rid=1120582&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00012.htm This paper investigated the effect of brief-tone stimulus duration on the amplitude of the brain stem auditory steady-state responses both in single- and multiple-stimulus conditions. ASSR amplitudes increased as stimulus duration decreased in the single-stimulus condition both at 500 Hz and 2000 Hz and in the 4-stimulus multiple-stimulus condition at 2000 Hz. However, at 500 Hz in the multiple-stimulus condition, ASSR amplitudes showed no change as stimulus duration decreased. When presented together with other stimuli in the multiple-stimulus condition, the amplitude gain of ASSRs was reduced by the interfering stimuli at 2000 Hz and removed at 500 Hz.Page: 121DOI: 10.1097/AUD.0b013e31815d6343Authors: Mo, Lingyan; Stapells, David R. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120582 Sat, 29 Dec 2007 01:27:53 +0100 1120582 http://www.medworm.com/index.php?rid=1120581&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00011.htm We found that bilateral implants offer significantly greater relief in terms of the experience of Social Restriction compared with a single implant, as measured by the Hearing Handicap Inventory for the Elderly, and that the trend is toward less Emotional Distress in the bilateral group. The HHIE was found to measure a Hearing Difficulty factor that was significantly lower in the bilateral group. People who retained a hearing aid in the non-implanted ear were highest in post-implant Emotional Distress, and showed the least contrast in pre-versus post-implant speech perception ability.Page: 112DOI: 10.1097/AUD.0b013e31815d6da8Authors: Noble, William 1,2; Tyler, Richard 2; Dunn, Camille 2; Bhullar, Navjot 1 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120581 Sat, 29 Dec 2007 01:27:53 +0100 1120581 http://www.medworm.com/index.php?rid=1120580&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00010.htm This study examined the improvement in speech comprehension by a simultaneously presented and masked transcription of the speech using auditory and/or visual modalities. Normal hearing participants performed Speech Reception Tests (auditory) and Text Reception Tests (visually), presented separately (unimodal) or simultaneously (bimodal). The observed bimodal benefit exceeded the bimodal benefit as predicted by an independent channels model. This indicates that incomplete or even small amounts of visual information can substantially augment speech comprehension in noise.Page: 99DOI: 10.1097/AUD.0b013e31815d6d8dAuthors: Zekveld, Adriana A.; Kramer, Sophia E.; Vlaming, Marcel S. M. G.; Houtgast, Tammo (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120580 Sat, 29 Dec 2007 01:27:53 +0100 1120580 http://www.medworm.com/index.php?rid=1120579&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00009.htm Older adults often report problems understanding one talker when a number of people are speaking simultaneously. The purpose of this study was to explore the relative contributions of energetic masking, informational masking, voice discrimination, and cognitive factors to these difficulties. Older and younger listeners responded to sentences presented in four types of maskers: steady-state noise; amplitude modulated noise; and two-talker male and female maskers. The ability to differentiate the target talker's voice from those of the masking talkers was also assessed. Results suggest that peripheral as well as higher-level factors are likely contributors to older adults' performance.Page: 87DOI: 10.1097/AUD.0b013e31815d638bAuthors: Helfer, Karen S.; Freyman, Richard L. (Sourc... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120579 Sat, 29 Dec 2007 01:27:53 +0100 1120579 http://www.medworm.com/index.php?rid=1120578&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00008.htm This study assessed how the reported benefit in noise is influenced by the fitting parameters of both the cochlear implant and hearing aid. Four EAS subjects were assessed on eight different fitting parameters using sentence testing in different noise levels (+15, +10 and +5 dB SPL). Subjects also evaluated each condition using a visual analogue scale. Results demonstrated that a reduced overlap of cochlear implant and hearing aid amplification produced best results across listening conditions.Page: 76DOI: 10.1097/AUD.0b013e31815d6326Authors: Vermeire, Katrien 1; Anderson, Ilona 2; Flynn, Mark 3; Van de Heyning, Paul 1 (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120578 Sat, 29 Dec 2007 01:27:53 +0100 1120578 http://www.medworm.com/index.php?rid=1120577&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00007.htm Exposure to loud noise may cause a temporary shift in auditory threshold. Whether noise-induced temporary threshold shift (TTS) could be attenuated by D-methionine and its possible relation to the biochemical changes of cochlear lateral walls were investigated. A 15.31 ± 3.80 dB TTS was observed immediately after noise exposure in saline-pretreated guinea pigs, which was significantly lowered to 4.06 ± 2.35 dB in D-methionine-treated animals. Furthermore, D-methionine enhanced TTS restoration to baseline level by one day. Noise inhibited ATPase activities as well as increased oxidative stress in guineapig cochlear lateral walls; all of these changes could be attenuated by D-methionine.Page: 65DOI: 10.1097/AUD.0b013e31815d635bAuthors: Cheng, Po-Wen 1,2; Liu, Shing-Hwa 3; Young... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120577 Sat, 29 Dec 2007 01:27:53 +0100 1120577 http://www.medworm.com/index.php?rid=1120576&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00006.htm This study provides an insider view of the demands, expectations and practical issues faced by parents. Whilst supporting the introduction of the UNHS program parents discuss how some of the challenges inherent in audiological management of very early identified children could be addressed.Page: 54DOI: 10.1097/AUD.0b013e31815ed8d0Authors: McCracken, Wendy; Young, Alys; Tattersall, Helen (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120576 Sat, 29 Dec 2007 01:27:53 +0100 1120576 http://www.medworm.com/index.php?rid=1120575&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00005.htm This study assessed the effect of envelope enhancement on the ability of subjects with auditory neuropathy to identify CV syllables. The envelope of the speech was enhanced by 15 dB for different modulation bandwidths (3 to 10 Hz; 3 to 20 Hz; 3 to 30 Hz; 3 to 60 Hz). The speech identification scores improved significantly when the envelope of the speech was enhanced. The improvement was greater for the broader band width condition when compared to smaller bandwidth condition. Results indicated that envelope enhancement may be a viable option for the rehabilitation of individuals with auditory neuropathy.Page: 45DOI: 10.1097/AUD.0b013e31812f719aAuthors: Narne, Vijaya Kumar; Vanaja, C S. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120575 Sat, 29 Dec 2007 01:27:53 +0100 1120575 http://www.medworm.com/index.php?rid=1120574&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00004.htm Eleven post-lingually deafened adults, bilaterally fitted with cochlear implants, were tested using interaural time difference (ITD) and interaural level difference (ILD) discrimination tasks in which noise signals were presented acoustically through headphones that fit over their two devices. In agreement with previously reported data, ITD thresholds were poor, while ILD thresholds approached those measured in normal-hearing listeners. Discounting data from two outlying subjects, ILD thresholds were highly correlated with error score in a horizontal-plane localization task. The results suggest that for subjects using bilateral implants, localization of noise signals is mediated entirely by ILD cues, with little or no contribution from ITD information.Page: 33DOI: 10.1097/AUD.0b013e31815d6... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120574 Sat, 29 Dec 2007 01:27:53 +0100 1120574 http://www.medworm.com/index.php?rid=1120573&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00003.htm The purpose of this study was to evaluate functional benefits associated with bilateral cochlear implantation. Speech perception was assessed in 26 post-lingually deafened adults receiving MED-EL COMBI 40+ devices bilaterally, with testing over one year post-implantation. Binaural stimulus presentation was superior to monaural presentation for CNC words in quiet and under several spatial configurations of CUNY sentences in noise. In most cases substantial benefit was found at the first measurement point. Binaural squelch, thought to reflect `true' binaural processing, was not reliably observed until 1 year post-implantation, suggesting that some aspects of binaural hearing may undergo prolonged development.Page: 20DOI: 10.1097/AUD.0b013e31815d7467Authors: Buss, Emily 1; Pillsbury, Harold C... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120573 Sat, 29 Dec 2007 01:27:53 +0100 1120573 http://www.medworm.com/index.php?rid=1120572&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00002.htm The Laser-Doppler Vibrometer (LDV) quickly measures the sound-induced velocity of the tympanic membrane in human subjects and patients. We demonstrate that the LDV is a sensitive and selective tool for the diagnosis and differentiation of various ossicular disorders in patients with intact tympanic membranes and aerated middle ears. The LDV readily separates patients with ossicular interruptions from ossicular fixations. The combination of LDV measurements and air-bone gap distinguishes patients with fixed stapes from those with fixed malleus. LDV measurements also help differentiate patients with ossicular pathologies from those with inner-ear sound conduction pathologies, e.g. superior semicircular canal dehiscence.Page: 3DOI: 10.1097/AUD.0b013e31815d63a5Authors: Rosowski, John J. 1,2,3;... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120572 Sat, 29 Dec 2007 01:27:53 +0100 1120572 http://www.medworm.com/index.php?rid=1120571&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200801000-00001.htm Page: 1DOI: 10.1097/AUD.0b013e318162cdb2Authors: Ryals, Brenda M. Ph.D. (Source: Ear and Hearing) Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1120571 Sat, 29 Dec 2007 00:38:29 +0100 1120571 http://www.medworm.com/index.php?rid=1000641&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200712000-00015.htm Compression release speed in the digital hearing instruments of 32 experienced users was either increased (fast) or decreased (slow). After 9 weeks of acclimatization, speech recognition in noise performance using constrained sentence material correlated more strongly with cognitive dual processing capacity (measured by the reading span test) when there was a mismatch between experience and test settings (fast-slow or slow-fast). Participants with low reading span scores showed poorer speech recognition under mismatch conditions. These findings are in line with the working memory framework for Ease of Language Understanding which predicts greater cognitive load in connection with mismatch.Page: 879DOI: 10.1097/AUD.0b013e3181576c9cAuthors: Rudner, Mary 1,2; Foo, Catharina 2; Ronnberg, Jerke... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1000641 Sat, 03 Nov 2007 00:20:43 +0100 1000641 http://www.medworm.com/index.php?rid=1000640&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200712000-00014.htm The P1-N1-P2 cortical evoked response to silent gaps was described for a group of young adults with normal hearing using stimulus conditions identical to those used in psychophysical studies of gap detection, including within-channel (spectrally identical markers) and across-channel (spectrally different markers) conditions. When the onset of the 2nd marker is perceptually salient, the amplitude of the P1-N1-P2 response is relatively larger and the P2 latency is relatively shorter than for non salient 2nd marker onsets, providing indicators of the neural coding of this important temporal cue in the thalamic-cortical region of the central auditory system. Gap duration appears to be most clearly indicated by P1 and T-complex amplitude.Page: 862DOI: 10.1097/AUD.0b013e3181576cbaAuthors: Lister... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1000640 Sat, 03 Nov 2007 00:20:43 +0100 1000640 http://www.medworm.com/index.php?rid=1000639&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200712000-00013.htm The main goals of this study were to assess the extent to which neural adaptation varied across cochlear implant users, to determine whether adaptation at the level of the auditory nerve was correlated with word recognition ability, and to determine if peripheral neural adaptation had an impact on the relationship between the ECAP thresholds and MAP levels. Adaptation was assessed in 21 Nucleus CI24 cochlear implant users by recording a series of 110 ECAP responses over a 5-minute stimulation period at three different stimulation rates (15, 80, and 300 Hz) using the Nucleus NRT software. Results revealed significant levels of adaptation for all 21 subjects at stimulation rates as low as 80 Hz, no relationship between adaptation and word recognition, and no relationship between the amount o... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1000639 Sat, 03 Nov 2007 00:20:43 +0100 1000639 http://www.medworm.com/index.php?rid=1000638&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200712000-00012.htm Population-based infant hearing screening has received worldwide attention as an opportunity to improve outcomes for children with hearing loss. However, there is limited information available on how to maximize the potential opportunities provided by early detection of hearing loss. Using conjoint analysis, a stated preference technique from the field of marketing, this study explored parent preferences for service delivery after the identification of hearing loss. The results of the questionnaire demonstrated that, above all other characteristics of service models, parents valued coordinated services that were available through one agency or at least managed through one agency. Overall, the survey indicated that the preferred model was coordinated, clinic-based services with a range of a... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1000638 Sat, 03 Nov 2007 00:20:43 +0100 1000638 http://www.medworm.com/index.php?rid=1000637&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200712000-00011.htm Turner syndrome is the most common sex chromosome disorder in females, and is caused by a total or partial deletion of one X chromosome. We analyzed audiologic and otologic data from 200 females with Turner syndrome ranging in age from 7 to 61 years and observed an age-related decline in hearing at a more rapid rate than seen in an otologically screened, standardized population. In addition, correlative analysis of hearing with karyotype reveals that air conduction threshold elevations are associated with loss of the p arm of chromosome X. This natural history study provides a representative description of the auditory phenotype associated with Turner syndrome, and avoids the ascertainment bias inherent in studies where patients are recruited through specialty referral clinics.Page: 831DOI... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1000637 Sat, 03 Nov 2007 00:20:43 +0100 1000637 http://www.medworm.com/index.php?rid=1000636&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200712000-00010.htm A hearing aid with trainable compression and noise-suppression parameters was evaluated over three take-home trials using volunteers with sensorineural hearing loss. For the first trial, 18 subjects were fitted with untrained settings based on the NAL-NL1 prescription, and each subject then attempted to train the aid's settings to their preference in real-life listening situations for up to 4 weeks. For the next two trials, subsets of these subjects blindly compared trained and untrained settings in real-life situations and logged the preferred settings in the aid's memory over 1 week. For most subjects, trained settings were preferred on a significant majority of comparisons, and trained noise suppression did not significantly affect the preference for the trained settings. The mai... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1000636 Sat, 03 Nov 2007 00:20:43 +0100 1000636 http://www.medworm.com/index.php?rid=1000635&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200712000-00009.htm The DSL[i/o] hearing instrument prescription method was evaluated for its acceptability for adult listeners; specifically, whether the prescribed frequency response optimally amplified average speech. Twenty-three adults with mild to moderately severe sensorineural hearing loss were fitted with a commercially available hearing aid with most features disabled. Speech intelligibility, loudness, and quality measures were taken at the prescribed frequency response and alternate frequency responses. Any differences between the subject's optimal response and the prescribed response were calculated in real-ear SPL. A range of optimal settings was found. These results and their implications for changes to the DSL prescription are discussed.Page: 793DOI: 10.1097/AUD.0b013e318157670aAuthors: ... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1000635 Sat, 03 Nov 2007 00:20:43 +0100 1000635 http://www.medworm.com/index.php?rid=1000634&cid=s_34238_161_f&fid=34238&url=http%3A%2F%2Fwww.ear-hearing.com%2Fpt%2Fre%2Fearhearing%2Fabstract.00003446-200712000-00008.htm The objective of this study was to determine appropriate parameters and protocols for DPOAE measurements which could be used in a diagnostic protocol to distinguish among different cochlear hearing disorders. To accomplish this task, the current study measured DPOAE responses in a reference group of young adults having excellent hearing. One result of the study was the derivation of reference standards for the emission threshold level (ETL), similar to the HL scale for pure-tone thresholds. We suggest that the diagnostic procedures previously proposed on the basis of gerbil lesion studies may be adapted with relatively little modification for use in human subjects. However, validity of the test and specific numerical results for human subjects remain to be firmly established for the purpos... Ear and Hearing journals http://www.medworm.com/rss/comments.php?id=1000634 Sat, 03 Nov 2007 00:20:43 +0100 1000634