Trends in Amplification最新文献_第2页

Maximizing the spectral and temporal benefits of two clinically used sound processing strategies for cochlear implants. 最大限度地提高频谱和时间效益的两种临床使用的声音处理策略的耳蜗植入。

Trends in Amplification Pub Date : 2012-12-01 DOI: 10.1177/1084713812467855

Jong Ho Won, Kaibao Nie, Ward R Drennan, Jay T Rubinstein

{"title":"Maximizing the spectral and temporal benefits of two clinically used sound processing strategies for cochlear implants.","authors":"Jong Ho Won, Kaibao Nie, Ward R Drennan, Jay T Rubinstein","doi":"10.1177/1084713812467855","DOIUrl":"https://doi.org/10.1177/1084713812467855","url":null,"abstract":"Previous work showed that the Fidelity120 processing strategy provides better spectral sensitivity, while the HiResolution processing strategy can deliver more detailed temporal information for Advanced Bionics cochlear implant users. The goal of this study was to develop a new sound processing strategy by maximizing the spectral benefit of Fidelity120 and the temporal benefit of HiResolution to improve both aspects of hearing. Using acoustic simulations of Fidelity120 and HiResolution strategies, a dual-processing strategy was created by combining Fidelity120 in the low frequency channels and HiResolution in the high frequency channels. Compared to Fidelity120, the dual processing provided an improvement in performance for Schroeder-phase discrimination at 200 Hz and temporal modulation detection at 200 Hz with the cost of a slightly decreased performance for spectral-ripple discrimination relative to Fidelity120. Spectral-ripple discrimination was better with the dual processing than with HiResolution. However, no benefit for speech perception in noise was found for the dual-processing strategy over Fidelity 120 or HiResolution in our preliminary tests. Some other more optimal combination of Fidelity120 and HiResolution may be required to maximize the spectral and temporal benefits to yield improved speech perception.","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1084713812467855","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31144032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

NAL-NL2 empirical adjustments. NAL-NL2 经验性调整。

Trends in Amplification Pub Date : 2012-12-01 Epub Date: 2012-11-30 DOI: 10.1177/1084713812468511

Gitte Keidser, Harvey Dillon, Lyndal Carter, Anna O'Brien

{"title":"NAL-NL2 empirical adjustments.","authors":"Gitte Keidser, Harvey Dillon, Lyndal Carter, Anna O'Brien","doi":"10.1177/1084713812468511","DOIUrl":"10.1177/1084713812468511","url":null,"abstract":"NAL-NL1, the first procedure from the National Acoustic Laboratories (NAL) for prescribing nonlinear gain, was a purely theoretically derived formula aimed at maximizing speech intelligibility for any input level of speech while keeping the overall loudness of speech at or below normal loudness. The formula was obtained through an optimization process in which speech intelligibility and loudness were predicted from selected models. Using updated models and applying some revisions to the derivation process, a theoretically derived NAL-NL2 formula was obtained in a similar way. Further adjustments, directed by empirical data collected in studies using NAL-NL1 as the baseline response, have been made to the theoretically derived formula. Specifically, empirical data have demonstrated that (a) female hearing aid users prefer lower overall gain than male users; (b) new hearing aid users with more than a mild hearing loss prefer increasingly less gain with increasing degree of hearing loss than experienced hearing aid users, and require up to 2 years to adapt to gain levels selected by experienced hearing aid users; (c) unilaterally and bilaterally fitted hearing aid users prefer overall gain levels that vary less than estimated by the bilateral correction factor; (d) adults prefer lower overall gain than children; and (e) people with severe/profound hearing loss prefer lower compression ratios than predicted when fitted with fast-acting compression. The literature and data leading to these conclusions are summarized and discussed in this article, and the procedure for implementing the adjustments to the theoretically derived NAL-NL2 formula is described.","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4040825/pdf/10.1177_1084713812468511.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31092621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Musical sound quality impairments in cochlear implant (CI) users as a function of limited high-frequency perception. 人工耳蜗使用者的音乐音质损伤是有限高频感知的函数。

Trends in Amplification Pub Date : 2012-12-01 Epub Date: 2012-11-19 DOI: 10.1177/1084713812465493

Alexis T Roy, Patpong Jiradejvong, Courtney Carver, Charles J Limb

{"title":"Musical sound quality impairments in cochlear implant (CI) users as a function of limited high-frequency perception.","authors":"Alexis T Roy, Patpong Jiradejvong, Courtney Carver, Charles J Limb","doi":"10.1177/1084713812465493","DOIUrl":"https://doi.org/10.1177/1084713812465493","url":null,"abstract":"The purpose of this study was to (a) apply the musical sound quality assessment method, Cochlear Implant-MUltiple Stimulus with Hidden Reference and Anchor (CI-MUSHRA), to quantify musical sound quality deficits in CI (cochlear implant) users with respect to high-frequency loss, and (b) assess possible correlations between CI-MUSHRA performance and self-reported musical sound quality, as assessed by more traditional rating scales. Five versions of real-world musical stimuli were created: 8-,4-, and 2-kHz low-pass-filtered (LPF) versions with increasing high-frequency removal, a composite stimulus containing a 1-kHz LPF-filtered version and white noise (\"anchor\"), and an unaltered version (\"hidden reference\"). Using the CI-MUSHRA methodology, these versions were simultaneously presented to participants in addition to a labeled reference. Participants listened to all versions and provided ratings based on a 100-point scale that reflected perceived sound quality difference among the versions. A total of 25 musical stimuli were tested. As comparison measures, participants completed four Visual Analogue Scales (VAS) to assess musical sound quality. Overall, compared to normal hearing (NH) listeners, CI users demonstrated an impaired ability to discriminate between unaltered and altered musical stimuli with variable amounts of high-frequency information removed. Performance using CI-MUSHRA to evaluate this parameter did not correlate to measurements of musical sound quality, as assessed by VAS. This study identified high-frequency loss as one acoustic parameter contributing to overall CI-mediated musical sound quality limitations. CI-MUSHRA provided a quantitative assessment of musical sound quality. This method offers the potential to quantify CI impairments of many different acoustic parameters related to musical sound quality in the future.","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1084713812465493","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31065910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Music and hearing aids--an introduction. 音乐和助听器——介绍。

Trends in Amplification Pub Date : 2012-09-01 DOI: 10.1177/1084713812468512

Marshall Chasin

引用次数: 19

Editorial. 社论。

Trends in Amplification Pub Date : 2012-09-01 DOI: 10.1177/1084713812464910

Marshall Chasin, Neil Hockley

引用次数: 0

Analog-to-digital conversion to accommodate the dynamics of live music in hearing instruments. 模拟到数字的转换，以适应动态的现场音乐在助听器。

Trends in Amplification Pub Date : 2012-09-01 DOI: 10.1177/1084713812471906

Neil S Hockley, Frauke Bahlmann, Bernadette Fulton

引用次数: 15

Factors influencing use of hearing protection by trumpet players. 影响小号手使用听力保护的因素。

Trends in Amplification Pub Date : 2012-09-01 DOI: 10.1177/1084713812468514

Mead C Killion

{"title":"Factors influencing use of hearing protection by trumpet players.","authors":"Mead C Killion","doi":"10.1177/1084713812468514","DOIUrl":"https://doi.org/10.1177/1084713812468514","url":null,"abstract":"Although a great many brass players, and trumpet players in particular, successfully use high-fidelity earplugs, others report problems with their use. This article discusses factors that may discourage a brass player from using hearing protection: These include (a) a lack of acclimatization time; (b) a loss of \"fortissimo blare\" from the aural distortion generated by the 110- to 120-dB SPL produced at the open ear with fortissimo playing; (c) a shallow earmold seal, leading to a large occlusion effect; (d) a poor seal combined with incorrect acoustic mass in the sound channel; and (e) hearing loss where many harmonic overtones of even moderately loud playing may become inaudible with earplugs to a lifelong trumpet player with high-frequency hearing loss. The limitations imposed by each of these can usually be overcome with modifications of the hearing protection device (HPD) or with acclimatization time, allowing a lifetime of playing without the all-too-common \"musicians' hearing loss\" and/or tinnitus. A review of these factors helps to delineate some of the perceptual issues that musicians may have with any change in the spectrum of their instrument-whether it is related to attenuation or amplification.","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1084713812468514","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31139986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Observations from a musician with hearing loss. 一位失聪音乐家的观察。

Trends in Amplification Pub Date : 2012-09-01 Epub Date: 2012-11-30 DOI: 10.1177/1084713812468513

Richard Einhorn

引用次数: 9

Effects of bandwidth, compression speed, and gain at high frequencies on preferences for amplified music. 带宽、压缩速度和高频增益对放大音乐偏好的影响。

Trends in Amplification Pub Date : 2012-09-01 Epub Date: 2012-11-19 DOI: 10.1177/1084713812465494

Brian C J Moore

{"title":"Effects of bandwidth, compression speed, and gain at high frequencies on preferences for amplified music.","authors":"Brian C J Moore","doi":"10.1177/1084713812465494","DOIUrl":"10.1177/1084713812465494","url":null,"abstract":"This article reviews a series of studies on the factors influencing sound quality preferences, mostly for jazz and classical music stimuli. The data were obtained using ratings of individual stimuli or using the method of paired comparisons. For normal-hearing participants, the highest ratings of sound quality were obtained when the reproduction bandwidth was wide (55 to 16000 Hz) and ripples in the frequency response were small (less than ± 5 dB). For hearing-impaired participants listening via a simulated five-channel compression hearing aid with gains set using the CAM2 fitting method, preferences for upper cutoff frequency varied across participants: Some preferred a 7.5- or 10-kHz upper cutoff frequency over a 5-kHz cutoff frequency, and some showed the opposite preference. Preferences for a higher upper cutoff frequency were associated with a shallow high-frequency slope of the audiogram. A subsequent study comparing the CAM2 and NAL-NL2 fitting methods, with gains slightly reduced for participants who were not experienced hearing aid users, showed a consistent preference for CAM2. Since the two methods differ mainly in the gain applied for frequencies above 4 kHz (CAM2 recommending higher gain than NAL-NL2), these results suggest that extending the upper cutoff frequency is beneficial. A system for reducing \"overshoot\" effects produced by compression gave small but significant benefits for sound quality of a percussion instrument (xylophone). For a high-input level (80 dB SPL), slow compression was preferred over fast compression.","PeriodicalId":48972,"journal":{"name":"Trends in Amplification","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4040859/pdf/10.1177_1084713812465494.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"31065909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Musicians and hearing aid design--is your hearing instrument being overworked? 音乐家和助听器设计——你的助听器工作过度了吗?

Trends in Amplification Pub Date : 2012-09-01 DOI: 10.1177/1084713812471586

Mark Schmidt

引用次数: 14