Document Detail


Masking period patterns of exponentially ramped and damped noises in hearing-impaired listeners.
MedLine Citation:
PMID:  19355128     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Noises that are modulated with either an exponentially rising (ramped), repeating modulator or a falling (damped), repeating modulator may evoke strong perceptual differences. To explore a possible cochlear contribution to these perceptual differences, masking period patterns (MPPs) of ramped and damped noises were measured for normal-hearing listeners at different stimulus levels and for hearing-impaired listeners. By time-reversing the ramped MPP, comparisons can be made between thresholds for which the masker power was the same between ramped and damped noises. Previous results showed that for normal-hearing listeners, the MPP of a ramped noise is considerably shallower than the MPP of a damped noise. The present results indicated that the differences between the damped and the time-reversed ramped MPPs were the largest at moderate stimulus levels and the smallest at low and high stimulus levels. Listeners with hearing loss exhibited no difference in the damped versus time-reversed ramped MPPs. Results will be discussed in terms of contributions of the cochlear nonlinearity and central auditory processes.
Authors:
Jennifer Lentz; Yi Shen
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  125     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-04-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2632     Citation Subset:  IM    
Affiliation:
Dept. of Speech and Hearing Sci., Indiana Univ., Bloomington, IN.
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