| Suppression and comodulation masking release in normal-hearing and hearing-impaired listeners. | |
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MedLine Citation:
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PMID: 20649225 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The detectability of a sinusoidal signal embedded in a masker at the signal frequency can be improved by simultaneously presenting additional maskers in off-frequency regions if the additional maskers and the on-frequency masker component have the same temporal envelope. This effect is commonly referred to as comodulation masking release (CMR). Recently, it was hypothesized that peripheral nonlinear processes such as suppression may play a role in CMR over several octaves when the level of the off-frequency masker component is higher than the level of the on-frequency masker component. The aim of the present study was to test this hypothesis by measuring suppression and CMR within the same subjects for various frequency-level combinations of the off-frequency masker component. Experimental data for normal-hearing listeners show a large overlap between the existence regions for suppression and CMR. Hearing-impaired subjects with a sensorineural hearing loss show, on average, negligible suppression and CMR. The data support the hypothesis that part of the CMR in experiments with large spectral distances and large level differences between the masker components is due to the nonlinear processing at the level of the cochlea. |
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Authors:
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Stephan M A Ernst; Jan Rennies; Birger Kollmeier; Jesko L Verhey |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 128 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-07-23 Completed Date: 2010-11-02 Revised Date: 2011-10-13 |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 300-9 Citation Subset: IM |
Affiliation:
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Institut fur Physik, Carl von Ossietzky Universitat Oldenburg, D-26111 Oldenburg, Germany. jesko.verhey@uni-oldenburg.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adult Audiometry Auditory Threshold Case-Control Studies Cochlea / physiopathology Female Hearing Impaired Persons / psychology* Hearing Loss, Sensorineural / physiopathology, psychology* Humans Male Middle Aged Nonlinear Dynamics Perceptual Masking* Pitch Discrimination Pitch Perception* Signal Detection, Psychological* Sound Spectrography Time Factors Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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