| The role of across-frequency processes in dichotic listening conditions. | |
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MedLine Citation:
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PMID: 20000932 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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In the bandwidening experiment with a diotic noise masker, an apparently wider critical bandwidth has often been reported when a dichotic signal (Spi) is used instead of a diotic signal (So). Two competing across-channel processes were proposed to account for this apparently wider critical bandwidth: (i) A detrimental across-channel effect reducing the binaural masking-level difference (BMLD) for broadband maskers and (ii) a beneficial integration of information across channels for narrowband maskers. The two hypotheses result in different predictions of the BMLD in the notched-noise experiment: According to the first hypothesis, the change in BMLD with notch width is determined by the level-dependence of the BMLD for a narrowband masker centered at the signal frequency, whereas the second hypothesis predicts that it is determined by the level-dependence of the BMLD for a broadband masker. To test the hypotheses, masked thresholds of a diotic or dichotic 500-Hz signal were measured for a diotic notched-noise masker as a function of notch width. In addition, thresholds were measured for a diotic broadband and narrowband masker as a function of masker level. The data indicate that neither of the two hypotheses is able to predict the continuous decrease in the BMLD as the notch width increases. |
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Authors:
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Marc Nitschmann; Jesko L Verhey; Birger Kollmeier |
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: 126 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2009-12-16 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: 3188-98 Citation Subset: IM |
Affiliation:
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International Graduate School Neurosensory Science and Systems, Carl-von-Ossietzky-Universitat Oldenburg, 26111 Oldenburg, Germany. marc.nitschmann@uni-oldenburg.de |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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