| Cross-modulation interference with lateralization of mixed-modulated waveforms. | |
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MedLine Citation:
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PMID: 20689037 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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PURPOSE: This study investigated the ability to use spatial information in mixed-modulated (MM) sounds containing concurrent frequency-modulated (FM) and amplitude-modulated (AM) sounds by exploring patterns of interference when different modulation types originated from different loci as may occur in a multisource acoustic field. METHOD: Interaural delay thresholds were measured from 5 normal-hearing adults for an AM sound in the presence of interfering FM and vice versa as a function of interferer modulation rate. In addition, the effects of near versus remote interferer rates, and fixed versus randomized interferer interaural delay, were investigated. RESULTS: AM interfered with lateralization of FM at all modulation rates. However, the FM interfered with AM lateralization only when the FM rate was higher than the AM rate. This rate asymmetry was surprising given the prevalence of low-frequency dominance in lateralization, but was predicted by a cross-correlation model of binaural interaction. Effects were similar for fixed and randomized interferer interaural delays. CONCLUSIONS: The results suggest that in multisource environments, sources containing different modulation types significantly interfere with localization in complex ways that reveal interactions between modulation type and rate. These findings contribute to the understanding of auditory object formation and localization. |
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Authors:
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I-Hui Hsieh; Agavni Petrosyan; Oscar F Gonçalves; Gregory Hickok; Kourosh Saberi |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2010-08-05 |
Journal Detail:
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Title: Journal of speech, language, and hearing research : JSLHR Volume: 53 ISSN: 1558-9102 ISO Abbreviation: J. Speech Lang. Hear. Res. Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-12-06 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9705610 Medline TA: J Speech Lang Hear Res Country: United States |
Other Details:
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Languages: eng Pagination: 1417-28 Citation Subset: IM |
Affiliation:
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Department of Cognitive Sciences, University of California, Irvine, Irvine, CA 92692, USA. |
Export Citation:
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Descriptor/Qualifier:
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| Grant Support | |
ID/Acronym/Agency:
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R01DC009659/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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