Effect of signal-to-noise ratio on directional microphone benefit and preference.
This study examined speech intelligibility and preferences for omnidirectional and directional microphone hearing aid processing across a range of signal-to-noise ratios (SNRs). A primary motivation for the study was to determine whether SNR might be used to represent distance between talker and lis...
| Publicado en: | Journal of the American Academy of Audiology Vol. 16; no. 9; pp. 662 - 677 |
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| Autores principales: | , , , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Thieme Medical Publishing Inc.
Oct2005
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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=ccm&AN=106440550&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106440550 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10500545 9OC jtl: Journal of the American Academy of Audiology issn: 10500545 maglogo: Y pubinfo: dt: Oct2005 vid: 16 iid: 9 pid: 2811 pub: Thieme Medical Publishing Inc. place: New York, New York artinfo: ui: 106440550 106440550 21202988 2009128828 10.3766/jaaa.16.9.4 NLM16515138 106440550 ppf: 662 ppct: 15 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Effect of signal-to-noise ratio on directional microphone benefit and preference. aug: au: Walden BE Surr RK Grant KW Summers WV Cord MT Dyrlund O affil: Army Audiology and Speech Center, Walter Reed Army Medical Center, 6900 Georgia AVenue, NW, Washington, DC 20307-5001; brian.walden@na.amedd.army.mil sug: subj: Hearing Aids Noise Speech Perception Transducers Aged Aged, 80 and Over Comparative Studies Descriptive Statistics Equipment Design Evaluation Research Female Funding Source Hearing Aid Fitting Hearing Loss, Sensorineural Male Middle Age Speech Intelligibility Two-Way Analysis of Variance Human Aged: 65+ years Aged, 80 & over Middle Aged: 45-64 years Female Male ab: This study examined speech intelligibility and preferences for omnidirectional and directional microphone hearing aid processing across a range of signal-to-noise ratios (SNRs). A primary motivation for the study was to determine whether SNR might be used to represent distance between talker and listener in automatic directionality algorithms based on scene analysis. Participants were current hearing aid users who either had experience with omnidirectional microphone hearing aids only or with manually switchable omnidirectional/directional hearing aids. Using IEEE/Harvard sentences from a front loudspeaker and speech-shaped noise from three loudspeakers located behind and to the sides of the listener, the directional advantage (DA) was obtained at 11 SNRs ranging from -15 dB to +15 dB in 3 dB steps. Preferences for the two microphone modes at each of the 11 SNRs were also obtained using concatenated IEEE sentences presented in the speech-shaped noise. Results revealed that a DA was observed across a broad range of SNRs, although directional processing provided the greatest benefit within a narrower range of SNRs. Mean data suggested that microphone preferences were determined largely by the DA, such that the greater the benefit to speech intelligibility provided by the directional microphones, the more likely the listeners were to prefer that processing mode. However, inspection of the individual data revealed that highly predictive relationships did not exist for most individual participants. Few preferences for omnidirectional processing were observed. Overall, the results did not support the use of SNR to estimate the effects of distance between talker and listener in automatic directionality algorithms. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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