| Spectro-temporal integration in signal detection. | |
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MedLine Citation:
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PMID: 2262627 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This paper is concerned with aspects of temporal integration and across-frequency integration in signal detection. Previous experiments on the detection of brief broadband signals (clicks) in continuous broadband noise revealed efficient spectral integration. The extent to which this effect is restricted to a critical time window was investigated by manipulating the temporal relations among the signal components in different frequency regions. In a typical experiment, the signal consists of nine brief Gaussian-shaped tone pulses, equally distributed at 1/3-oct intervals, each with a spectral width of about 1/3 oct, and each equally detectable in white noise. In the synchronized condition (i.e. coinciding peaks of the nine Gaussian envelopes), the detection threshold is reached when the levels of the nine individual tone pulses are about 8 dB below their individual threshold levels (efficient spectral integration). When the signal is progressively desynchronized (i.e. noncoinciding peaks of the Gaussian envelopes), detection threshold is found to increase. This suggests that efficient spectral integration in signal detection is confined to a narrow time window, with a typical value of 30 ms. Similar experiments were performed with respect to the efficiency of temporal integration. For constant-duration signals (100 ms), the detection threshold is found to increase when progressively widening signal bandwidth. The data indicate that the efficient temporal integration in signal detection is confined to a narrow frequency window, which, not surprisingly, corresponds to the critical bandwidth. |
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Authors:
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W A van den Brink; T Houtgast |
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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: 88 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 1990 Oct |
Date Detail:
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Created Date: 1991-02-01 Completed Date: 1991-02-01 Revised Date: 2006-12-27 |
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: 1703-11 Citation Subset: IM |
Affiliation:
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TNO Institute for Perception, Soesterberg, The Netherlands. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Attention* Auditory Threshold Humans Pitch Discrimination* Psychoacoustics Time Perception* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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