Spectral peak resolution and speech recognition in quiet: Normal hearing, hearing impaired and cochlear implant listeners

Henry, Belinda A., Turner, Christopher W. and Behrens, Amy (2005) Spectral peak resolution and speech recognition in quiet: Normal hearing, hearing impaired and cochlear implant listeners. The Journal of the Acoustical Society of America, 118 2: 1111-1121. doi:10.1121/1.1944567

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Author Henry, Belinda A.
Turner, Christopher W.
Behrens, Amy
Title Spectral peak resolution and speech recognition in quiet: Normal hearing, hearing impaired and cochlear implant listeners
Journal name The Journal of the Acoustical Society of America   Check publisher's open access policy
ISSN 0001-4966
1520-8524
Publication date 2005-08
Sub-type Article (original research)
DOI 10.1121/1.1944567
Open Access Status File (Publisher version)
Volume 118
Issue 2
Start page 1111
End page 1121
Total pages 11
Place of publication Melville, NY, United States
Publisher A I P Publishing LLC
Language eng
Subject 320705 Sensory Systems
321025 Rehabilitation and Therapy - Hearing and Speech
380302 Linguistic Processes (incl. Speech Production and Comprehension)
Abstract Spectral peak resolution was investigated in normal hearing (NH), hearing impaired (HI), and cochlear implant (CI) listeners. The task involved discriminating between two rippled noise stimuli in which the frequency positions of the log-spaced peaks and valleys were interchanged. The ripple spacing was varied adaptively from 0.13 to 11.31 ripples/octave, and the minimum ripple spacing at which a reversal in peak and trough positions could be detected was determined as the spectral peak resolution threshold for each listener. Spectral peak resolution was best, on average, in NH listeners, poorest in CI listeners, and intermediate for HI listeners. There was a significant relationship between spectral peak resolution and both vowel and consonant recognition in quiet across the three listener groups. The results indicate that the degree of spectral peak resolution required for accurate vowel and consonant recognition in quiet backgrounds is around 4 ripples/octave, and that spectral peak resolution poorer than around 1–2 ripples/octave may result in highly degraded speech recognition. These results suggest that efforts to improve spectral peak resolution for HI and CI users may lead to improved speech recognition
Keyword Degradation
Implants (surgical)
Natural frequencies
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Health and Rehabilitation Sciences Publications
 
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