| Comodulation masking release in a forward-masking paradigm. | |
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MedLine Citation:
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PMID: 3693702 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Waveforms that yield comodulation masking release (CMR) when they are presented simultaneously with a signal were used in a standard forward-masking procedure. The signal was a 25-ms sample of a 2500-Hz tone. The masker was a band of noise centered at 2500 Hz, 100 Hz in width, and 200 ms in duration. Presented with the masker were two or four cue bands, each 100 Hz wide and centered at various distances from the masker band. These cue bands either all had the same temporal envelope as the masker band (correlated condition) or their common envelope was different from that of the masker band (uncorrelated condition). In the initial experiments, (1) detectability of the tonal signal was 7-18 dB better when the masker band was accompanied by cue bands than when it was not--an effect that would be expected from past research on lateral suppression--but further, (2) the signal was about 3 dB more detectable in the correlated conditions than in the uncorrelated conditions. In follow-up experiments, these CMR-like differences between the correlated and uncorrelated conditions were substantially reduced (although not eliminated) by presenting a contralateral, wideband noise that was gated synchronously with the masker and/or cue bands. The implications are that the initial results were attributable in part to the "confusion effects" known to exist in certain temporal-masking situations, and that listeners are able to obtain greater information about the temporal extent of a masker band from correlated cue bands than from uncorrelated bands.(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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D McFadden; B A Wright |
Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 82 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 1987 Nov |
Date Detail:
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Created Date: 1988-02-11 Completed Date: 1988-02-11 Revised Date: 2007-11-14 |
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: 1615-20 Citation Subset: IM |
Affiliation:
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Department of Psychology, University of Texas, Austin 78712. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adult Analysis of Variance Auditory Perception* Hearing Humans Perceptual Masking* |
| Grant Support | |
ID/Acronym/Agency:
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NS 15895/NS/NINDS NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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