| Spectral integration of synchronous and asynchronous cues to consonant identification. | |
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MedLine Citation:
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PMID: 15139639 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The goal of the present research was to determine how well observers utilize cues to consonant identification from different spectral regions that occur asynchronously as opposed to synchronously across frequency; such an ability would be useful for processing speech in the context of a spectro-temporally complex masker (e.g., competing speech). This was assessed by obtaining masked identification thresholds for VCV speech material, of the form /a/ C /a/, under various conditions of 10-Hz or 20-Hz square-wave amplitude modulation (AM). The speech tokens were filtered into 2, 4, 8, or 16 contiguous log-spaced frequency bands spanning 0.1 to 10 kHz. Bands were then modulated, with the pattern of that AM being either coherent across bands or 180 degrees out of phase for adjacent bands. In the out-of-phase conditions the odd-numbered bands had coherent phase AM and the even bands had coherent phase AM, but the AM pattern across these two subsets of bands were out of phase. Results from these two conditions, along with further conditions employing only modulated even- or odd-numbered bands, allowed performance to be compared between stimuli characterized by synchronous and asynchronous cues. Results indicate that observers are able to utilize asynchronously presented cues to consonant identification efficiently across a range of conditions. |
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Authors:
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Emily Buss; Joseph W Hall; John H Grose |
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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: 115 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2004 May |
Date Detail:
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Created Date: 2004-05-13 Completed Date: 2004-08-16 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: 2278-85 Citation Subset: IM |
Affiliation:
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The Department of Otolaryngology/Head and Neck Surgery at The University of North Carolina School of Medicine, 130 Mason Farm Road, CB#7070, 1115 Bioinformatics Building, Chapel Hill, North Carolina 27599, USA. ebuss@med.unc.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adult Cues* Female Humans Male Perceptual Masking Phonetics Speech Acoustics Speech Perception / physiology* |
| Grant Support | |
ID/Acronym/Agency:
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R01 DC00418/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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