A fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking

The power spectrum model of masking (Patterson and Moore, 1986) assumes that the masking ability of a sound is affected only by the frequency and intensity of the masker, but not the phase. The well-documented difference in masking produced by different phases of Schroeder- phase harmonic complexes...

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Bibliographic Details
Main Authors:	Rahmat, Sarah, O'Beirne, Greg A.
Format:	Conference or Workshop Item
Language:	English
Published:	ibrahim KARA 2015
Subjects:	Q Science (General)
Online Access:	http://irep.iium.edu.my/49087/ http://irep.iium.edu.my/49087/ http://irep.iium.edu.my/49087/1/A_FAST_METHOD_FOR_THE_PSYCHOPHYSICAL_ESTIMATION_OF_NONLINEAR_COCHLEAR_FUNCTION_USING_SCHROEDER-PHASE_MASKING..pdf

id	iium-49087
recordtype	eprints
spelling	iium-490872018-05-21T02:41:50Z http://irep.iium.edu.my/49087/ A fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking Rahmat, Sarah O'Beirne, Greg A. Q Science (General) The power spectrum model of masking (Patterson and Moore, 1986) assumes that the masking ability of a sound is affected only by the frequency and intensity of the masker, but not the phase. The well-documented difference in masking produced by different phases of Schroeder- phase harmonic complexes the ("phase effect") is thought to be contributed by the phase curvature of the auditory filter and nonlinear cochlear processing (Kohlrausch & Sander, 1995). We have recently developed a fast method for recording Schroeder-phase masking functions in humans which takes 8 minutes of testing time rather than the 45 minutes taken by the conventional three alternative forced choice (3AFC) method. We demonstrate here the reliability of this new method and its potential use in measuring cochlear non-linearity. Schroeder-phase masking functions were measured in 38 normal hearing and 15 hearing impaired participants using the conventional and fast methods. Results from our fast method agreed well with those from the conventional 3AFC method. We also used the fast method to measure functions at 0.25, 0.5, 1, 2, and 4 kHz at 45 and 75 dB A masker levels in normal hearing and hearing impaired participants, and found significantly reduced phase effects at low presentation levels and in participants with SNHL compared to normal hearing participants (p<0.05), consistent with reductions in cochlear nonlinearity in those conditions. With an 80% reduction of testing time as compared to the conventional method, the fast method has great potential to aid future studies estimating nonlinear cochlear function. ibrahim KARA 2015 Conference or Workshop Item NonPeerReviewed application/pdf en http://irep.iium.edu.my/49087/1/A_FAST_METHOD_FOR_THE_PSYCHOPHYSICAL_ESTIMATION_OF_NONLINEAR_COCHLEAR_FUNCTION_USING_SCHROEDER-PHASE_MASKING..pdf Rahmat, Sarah and O'Beirne, Greg A. (2015) A fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking. In: 12th European Federation of Audiology Societies (EFAS) Congress, 27th - 30th May 2015, Istanbul, Turkey. (Unpublished) http://eds.a.ebscohost.com/abstract?site=eds&scope=site&jrnl=13087649&AN=103260587&h=BkGK98M9Cafke%2bd%2bt2ucffBjI24jMqqD6AeQKHuqDpIa2mbTz1cu8Hnu4%2bB1VXuGJzs1cCfDKUqb%2bMWYFrKlbA%3d%3d&crl=c&resultLocal=ErrCrlNoResults&resultNs=Ehost&crlhashurl=login.asp
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	Q Science (General)
spellingShingle	Q Science (General) Rahmat, Sarah O'Beirne, Greg A. A fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking
description	The power spectrum model of masking (Patterson and Moore, 1986) assumes that the masking ability of a sound is affected only by the frequency and intensity of the masker, but not the phase. The well-documented difference in masking produced by different phases of Schroeder- phase harmonic complexes the ("phase effect") is thought to be contributed by the phase curvature of the auditory filter and nonlinear cochlear processing (Kohlrausch & Sander, 1995). We have recently developed a fast method for recording Schroeder-phase masking functions in humans which takes 8 minutes of testing time rather than the 45 minutes taken by the conventional three alternative forced choice (3AFC) method. We demonstrate here the reliability of this new method and its potential use in measuring cochlear non-linearity. Schroeder-phase masking functions were measured in 38 normal hearing and 15 hearing impaired participants using the conventional and fast methods. Results from our fast method agreed well with those from the conventional 3AFC method. We also used the fast method to measure functions at 0.25, 0.5, 1, 2, and 4 kHz at 45 and 75 dB A masker levels in normal hearing and hearing impaired participants, and found significantly reduced phase effects at low presentation levels and in participants with SNHL compared to normal hearing participants (p<0.05), consistent with reductions in cochlear nonlinearity in those conditions. With an 80% reduction of testing time as compared to the conventional method, the fast method has great potential to aid future studies estimating nonlinear cochlear function.
format	Conference or Workshop Item
author	Rahmat, Sarah O'Beirne, Greg A.
author_facet	Rahmat, Sarah O'Beirne, Greg A.
author_sort	Rahmat, Sarah
title	A fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking
title_short	A fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking
title_full	A fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking
title_fullStr	A fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking
title_full_unstemmed	A fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking
title_sort	fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking
publisher	ibrahim KARA
publishDate	2015
url	http://irep.iium.edu.my/49087/ http://irep.iium.edu.my/49087/ http://irep.iium.edu.my/49087/1/A_FAST_METHOD_FOR_THE_PSYCHOPHYSICAL_ESTIMATION_OF_NONLINEAR_COCHLEAR_FUNCTION_USING_SCHROEDER-PHASE_MASKING..pdf
first_indexed	2023-09-18T21:09:27Z
last_indexed	2023-09-18T21:09:27Z
_version_	1777411154005458944

A fast method for the psychophysical estimation of nonlinear cochlear function using schroeder-phase masking

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