Effects of expansion on consonant recognition and consonant audibility [corrected] [published erratum appears in J AM ACAD AUDIOL 2009 Nov-Dec;20(10):658].
BACKGROUND: Hearing aid expansion is intended to reduce the gain for low-level noise. However, expansion can also degrade low-intensity speech. Although it has been suggested that the poorer performance with expansion is due to reduced audibility, this has not been measured directly. Furthermore, pr...
| Published in: | Journal of the American Academy of Audiology Vol. 20; no. 2; pp. 119 - 128 |
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| Main Authors: | , |
| Format: | research tables/charts Journal Article |
| Published: |
Thieme Medical Publishing Inc.
Feb2009
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105252431&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105252431 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: Feb2009 vid: 20 iid: 2 pid: 2811 pub: Thieme Medical Publishing Inc. place: New York, New York artinfo: ui: 105252431 41245177 2010489700 10.3766/jaaa.20.2.5 NLM19927675 PMC2784644 105252431 ppf: 119 ppct: 9 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Effects of expansion on consonant recognition and consonant audibility [corrected] [published erratum appears in J AM ACAD AUDIOL 2009 Nov-Dec;20(10):658]. aug: au: Brennan M Souza P affil: Speech and Hearing Sciences, University of Washington, 1417 NE 42nd St., Seattle, WA 98105, USA; mabrenn1@u.washington.edu sug: subj: Consonants Digital Compression Methods Hearing Aids Utilization Hearing Loss, Sensorineural Speech Perception Acoustic Stimulation Adult Aged Aged, 80 and Over Analysis of Variance Audiometry Consumer Satisfaction Correlational Studies Education, Continuing (Credit) Experimental Studies Funding Source Middle Age Regression Repeated Measures Speech Discrimination Tests Tympanic Membrane Adult: 19-44 years Aged: 65+ years Aged, 80 & over Middle Aged: 45-64 years ab: BACKGROUND: Hearing aid expansion is intended to reduce the gain for low-level noise. However, expansion can also degrade low-intensity speech. Although it has been suggested that the poorer performance with expansion is due to reduced audibility, this has not been measured directly. Furthermore, previous studies used relatively high expansion kneepoints. PURPOSE: This study compared the effect of a 30 dB SPL and 50 dB SPL expansion kneepoint on consonant audibility and recognition. RESEARCH DESIGN: Eight consonant-vowel syllables were presented at 50, 60, and 71 dB SPL. Recordings near the tympanic membrane were made of each speech token and used to calculate the Aided Audibility Index (AAI). STUDY SAMPLE: Thirteen subjects with mild to moderate sensorineural hearing loss. RESULTS: Expansion with a high kneepoint resulted in reduced consonant recognition. The AAI correlated significantly with consonant recognition across all conditions and subjects. CONCLUSION: If consonant recognition is the priority, audibility calculations could be used to determine an optimal expansion kneepoint for a given individual. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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