| The influence of practice on the discrimination of spectro-temporal modulation depth. | |
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MedLine Citation:
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PMID: 20331021 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The pattern of sound energy spread across frequency and time (spectro-temporal modulation) is a crucial stimulus cue for sound identification. Improvements in the sensitivity to this modulation could potentially aid performance on numerous real-world tasks, yet it is unknown how practice influences this sensitivity. To investigate this issue, normal-hearing adults (n=8) were trained approximately 1 hday for 7 days to discriminate between noises with the same spectro-temporal modulation drifting upward in audio frequency but with different modulation depths. Performance on the trained condition and on four untrained conditions was examined both before and after the training phase. Depth-discrimination thresholds improved significantly on the trained condition and on an untrained condition with a downward-drifting modulation. Discrimination thresholds also improved in subsets of listeners on untrained isolated component modulations (spectral or temporal) of the trained spectro-temporal modulation. Finally, the ability to detect the trained spectro-temporal modulation worsened significantly in proportion to the amount of improvement on the trained discrimination task. These data suggest that training on depth discrimination may be a means of improving sensitivity to spectro-temporal modulation depth in real-world stimuli, but potentially at the cost of the ability to detect these modulations. [Work supported by NIHNIDCD]. |
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Authors:
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Andrew T Sabin; David A Eddins; Beverly A Wright |
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: 1988 Citation Subset: IM |
Affiliation:
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Dept. of Commun. Sci. and Disord., Northwestern Univ., 2240 Campus Dr., Evanston, IL 60201, a-sabin@northwestern.eduUniv. of Rochester, Rochester, NYNorthwestern Univ., Evanston, IL 60201. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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