Document Detail

The effect of basilar-membrane nonlinearity on the shapes of masking period patterns in normal and impaired hearing.
MedLine Citation:
PMID:  11325128     Owner:  NLM     Status:  MEDLINE    
Masking period patterns (MPPs) were measured in listeners with normal and impaired hearing using amplitude-modulated tonal maskers and short tonal probes. The frequency of the masker was either the same as the frequency of the probe (on-frequency masking) or was one octave below the frequency of the probe (off-frequency masking). In experiment 1, MPPs were measured for listeners with normal hearing using different masker levels. Carrier frequencies of 3 and 6 kHz were used for the masker. The probe had a frequency of 6 kHz. For all masker levels, the off-frequency MPPs exhibited deeper and longer valleys compared with the on-frequency MPPs. Hearing-impaired listeners were tested in experiment 2. For some hearing-impaired subjects, masker frequencies of 1.5 kHz and 3 kHz were paired with a probe frequency of 3 kHz. MPPs measured for listeners with hearing loss had similar shapes for on- and off-frequency maskers. It was hypothesized that the shapes of MPPs reflect nonlinear processing at the level of the basilar membrane in normal hearing and more linear processing in impaired hearing. A model assuming different cochlear gains for normal versus impaired hearing and similar parameters of the temporal integrator for both groups of listeners successfully predicted the MPPs.
M Wojtczak; A C Schroder; Y Y Kong; D A Nelson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  109     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2001 Apr 
Date Detail:
Created Date:  2001-04-27     Completed Date:  2001-06-21     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1571-86     Citation Subset:  IM    
Clinical Psychoacoustics Laboratory, University of Minnesota, Minneapolis 55455, USA.
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MeSH Terms
Auditory Perception / physiology*
Auditory Threshold / physiology
Basilar Membrane / physiology*
Hearing / physiology*
Hearing Loss, High-Frequency / diagnosis*
Hearing Loss, Sensorineural / diagnosis*
Models, Biological
Perceptual Masking*
Time Factors
Grant Support

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

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