Document Detail

Temporal integration and compression near absolute threshold in normal and impaired ears.
MedLine Citation:
PMID:  17902859     Owner:  NLM     Status:  MEDLINE    
The decrease in absolute threshold with increasing stimulus duration (often referred to as "temporal integration") is greater for listeners with normal hearing than for listeners with sensorineural hearing loss. It has been suggested that the difference is related to reduced basilar-membrane (BM) compression in the impaired group. The present experiment tested this hypothesis by comparing temporal integration and BM compression in normal and impaired ears at low levels. Absolute thresholds were measured for 4, 24, and 44 ms pure-tone signals, with frequencies (f(s)) of 2 and 4 kHz. The difference between the absolute thresholds for the 4 and 24 ms signals was used as a measure of temporal integration. Compression near threshold was estimated by measuring the level of a 100 ms off-frequency (0.45f(s)) pure-tone forward masker required to mask a 44 ms pure-tone signal presented at sensation levels of 5 and 10 dB. There was a significant negative correlation between amount of temporal integration and absolute threshold. However, there was no correlation between absolute threshold and compression at low levels; both normal and impaired ears showed a nearly linear response. The results suggest that the differences in integration between normal and impaired ears cannot be explained by differences in BM compression.
Christopher J Plack; Vicki Skeels
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  122     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2007 Oct 
Date Detail:
Created Date:  2007-10-01     Completed Date:  2007-11-28     Revised Date:  2014-09-30    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2236-44     Citation Subset:  IM    
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MeSH Terms
Audiometry, Pure-Tone*
Auditory Threshold / physiology*
Basement Membrane / physiopathology*
Hair Cells, Auditory, Inner / physiology
Hair Cells, Auditory, Outer / physiology
Hearing Loss, Sensorineural / physiopathology*
Middle Aged
Perceptual Masking / physiology
Recruitment Detection, Audiologic*
Reference Values
Grant Support
BB/D012953/1//Biotechnology and Biological Sciences Research Council

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

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