| Effect of stimulus level and place of stimulation on temporal pitch perception by cochlear implant users. | |
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MedLine Citation:
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PMID: 21117749 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Three experiments studied the effect of pulse rate on temporal pitch perception by cochlear implant users. Experiment 1 measured rate discrimination for pulse trains presented in bipolar mode to either an apical, middle, or basal electrode and for standard rates of 100 and 200 pps. In each block of trials the signals could have a level of -0.35, 0, or +0.35 dB re the standard, and performance for each signal level was recorded separately. Signal level affected performance for just over half of the combinations of subject, electrode, and standard rate studied. Performance was usually, but not always, better at the higher signal level. Experiment 2 showed that, for a given subject and condition, the direction of the effect was similar in monopolar and bipolar mode. Experiment 3 employed a pitch comparison procedure without feedback, and showed that the signal levels in experiment 1 that produced the best performance for a given subject and condition also led to the signal having a higher pitch. It is concluded that small level differences can have a robust and substantial effect on pitch judgments and argue that these effects are not entirely due to response biases or to co-variation of place-of-excitation with level. |
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Authors:
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Robert P Carlyon; Catherine Lynch; John M Deeks |
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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 May |
Date Detail:
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Created Date: 2010-12-01 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: 2997 Citation Subset: IM |
Affiliation:
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MRC Cognition and Brain Sciences Unit, 15 Chaucer Road, Cambridge CB1 3DA, United Kingdom. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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