The Effect of Nonlinear Amplitude Growth on the Speech Perception Benefits Provided by a Single-Sided Vocoder.
Purpose: For listeners with single-sided deafness, a cochlear implant (CI) can improve speech understanding by giving the listener access to the ear with the better target-to-masker ratio (TMR; head shadow) or by providing interaural difference cues to facilitate the perceptual separation of concurr...
| Publicado en: | Journal of Speech, Language & Hearing Research Vol. 62; no. 3; pp. 745 - 758 |
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| Autores principales: | , |
| Formato: | Artículo |
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American Speech-Language-Hearing Association
Mar2019
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=135541795&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 135541795 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 10924388 1SM jtl: Journal of Speech, Language & Hearing Research issn: 10924388 maglogo: N pubinfo: dt: Mar2019 vid: 62 iid: 3 pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 135541795 10.1044/2018_JSLHR-H-18-0001 ppf: 745 ppct: 13 formats: fmt: @attributes: type: P size: 1MB tig: atl: The Effect of Nonlinear Amplitude Growth on the Speech Perception Benefits Provided by a Single-Sided Vocoder. aug: au: Wess, Jessica M. Bernstein, Joshua G. W. affil: National Military Audiology and Speech Pathology Center, Walter Reed National Military Medical Center, Bethesda, MD Neuroscience and Cognitive Science Program, Department of Hearing and Speech Sciences, University of Maryland, College Park su: Treatment of deafness Auditory perception Chi-squared test Cochlear implants Research funding Speech perception Statistics Logistic regression analysis Data analysis Loudness Acoustic localization Descriptive statistics sug: subj: Treatment of deafness Auditory perception Chi-squared test Cochlear implants Research funding Speech perception Statistics Logistic regression analysis Data analysis Loudness Acoustic localization Descriptive statistics ab: Purpose: For listeners with single-sided deafness, a cochlear implant (CI) can improve speech understanding by giving the listener access to the ear with the better target-to-masker ratio (TMR; head shadow) or by providing interaural difference cues to facilitate the perceptual separation of concurrent talkers (squelch). CI simulations presented to listeners with normal hearing examined how these benefits could be affected by interaural differences in loudness growth in a speechon- speech masking task. Method: Experiment 1 examined a target-masker spatial configuration where the vocoded ear had a poorer TMR than the nonvocoded ear. Experiment 2 examined the reverse configuration. Generic head-related transfer functions simulated free-field listening. Compression or expansion was applied independently to each vocoder channel (powerlaw exponents: 0.25, 0.5, 1, 1.5, or 2). Results: Compression reduced the benefit provided by the vocoder ear in both experiments. There was some evidence that expansion increased squelch in Experiment 1 but reduced the benefit in Experiment 2 where the vocoder ear provided a combination of head-shadow and squelch benefits. Conclusions: The effects of compression and expansion are interpreted in terms of envelope distortion and changes in the vocoded-ear TMR (for head shadow) or changes in perceived target-masker spatial separation (for squelch). The compression parameter is a candidate for clinical optimization to improve single-sided deafness CI outcomes. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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