Document Detail

Behavioral measures of cochlear compression and temporal resolution as predictors of speech masking release in hearing-impaired listeners.
MedLine Citation:
PMID:  24116426     Owner:  NLM     Status:  MEDLINE    
Hearing-impaired (HI) listeners often show less masking release (MR) than normal-hearing listeners when temporal fluctuations are imposed on a steady-state masker, even when accounting for overall audibility differences. This difference may be related to a loss of cochlear compression in HI listeners. Behavioral estimates of compression, using temporal masking curves (TMCs), were compared with MR for band-limited (500-4000 Hz) speech and pure tones in HI listeners and age-matched, noise-masked normal-hearing (NMNH) listeners. Compression and pure-tone MR estimates were made at 500, 1500, and 4000 Hz. The amount of MR was defined as the difference in performance between steady-state and 10-Hz square-wave-gated speech-shaped noise. In addition, temporal resolution was estimated from the slope of the off-frequency TMC. No significant relationship was found between estimated cochlear compression and MR for either speech or pure tones. NMNH listeners had significantly steeper off-frequency temporal masking recovery slopes than did HI listeners, and a small but significant correlation was observed between poorer temporal resolution and reduced MR for speech. The results suggest either that the effects of hearing impairment on MR are not determined primarily by changes in peripheral compression, or that the TMC does not provide a sufficiently reliable measure of cochlear compression.
Melanie J Gregan; Peggy B Nelson; Andrew J Oxenham
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  134     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-10-14     Completed Date:  2014-05-30     Revised Date:  2014-10-09    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2895-912     Citation Subset:  IM    
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MeSH Terms
Acoustic Stimulation
Audiometry, Pure-Tone
Audiometry, Speech
Auditory Threshold
Case-Control Studies
Cochlea / physiopathology*
Hearing Loss, Sensorineural / diagnosis,  physiopathology*,  psychology*
Middle Aged
Perceptual Masking*
Persons With Hearing Impairments / psychology*
Severity of Illness Index
Speech Perception*
Time Factors
Young Adult
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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