| Comparison of central masking versus monotic masking in non-simultaneous masking conditions. | |
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MedLine Citation:
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PMID: 20330302 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The growth of non-simultaneous masking was compared in a central masking versus a monotic masking condition for the same masker and signal parameters. Detection thresholds of normal listeners were measured utilizing a 2AFC up-down adaptive-tracking procedure. Signal-to-masker time intervals were 0, 2, 5, 10, 20, and 50-ms. Brief sinusoidal signals at 0.5, 1, 2, and 4 kHz were masked by a two-octave band of noise of 200 ms duration. The masker was centered on and off the frequency of the signal. Detection thresholds were greater for signal-to-masker intervals less than 50 ms in forward masking using both central and monotic masking conditions. Backward central masking did not result in significant threshold shifts. High-frequency signals produced greater central masking effects; however, signals at lower frequencies were more effectively masked in monotic conditions. In contrast with monotic masking conditions, off-frequency maskers did not produce a clear central masking effect. Results of this study are consistent with neurophysiologic findings of medial olivocochlear bundle response characteristics and support the idea that central masking is mediated by efferent fibers in humans. |
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Authors:
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Mahnaz Ahmadi; Lawrence L Feth |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 127 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-03-24 Completed Date: - Revised Date: - |
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: 1808 Citation Subset: IM |
Affiliation:
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Dept. of Speech and Hearing Sci., The Ohio State Univ., 110 Pressey Hall, 1070 Carmack Rd., Columbus, OH 43210. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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