| The effects of real and illusory glides on pure-tone frequency discrimination. | |
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MedLine Citation:
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PMID: 15296008 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Experiment 1 measured pure-tone frequency difference limens (DLs) at 1 and 4 kHz. The stimuli had two steady-state portions, which differed in frequency for the target. These portions were separated by a middle section of varying length, which consisted of a silent gap, a frequency glide, or a noise burst (conditions: gap, glide, and noise, respectively). The noise burst created an illusion of the tone continuing through the gap. In the first condition, the stimuli had an overall duration of 500 ms. In the second condition, stimuli had a fixed 50-ms middle section, and the overall duration was varied. DLs were lower for the glide than for the gap condition, consistent with the idea that the auditory system contains a mechanism specific for the detection of dynamic changes. DLs were generally lower for the noise than for the gap condition, suggesting that this mechanism extracts information from an illusory glide. In a second experiment, pure-tone frequency direction-discrimination thresholds were measured using similar stimuli as for the first experiment. For this task, the type of the middle section hardly affected the thresholds, suggesting that the frequency-change detection mechanism does not facilitate the identification of the direction of frequency changes. |
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Authors:
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J Lyzenga; R P Carlyon; B C J Moore |
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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: 116 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2004 Jul |
Date Detail:
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Created Date: 2004-08-05 Completed Date: 2004-11-23 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: 491-501 Citation Subset: IM |
Affiliation:
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MRC Cognition and Brain Sciences Unit, 15 Chaucer Road, Cambridge CB2 2EF United Kingdom. johannes.lyzenga@mrc-cbu.cam.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Audiometry, Pure-Tone Auditory Threshold Differential Threshold / physiology* Discrimination (Psychology) / physiology* Humans Pitch Perception / physiology* Psychoacoustics |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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