| Perceptual adaptation by normally hearing listeners to a simulated "hole" in hearing. | |
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MedLine Citation:
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PMID: 17225428 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Simulations of cochlear implants have demonstrated that the deleterious effects of a frequency misalignment between analysis bands and characteristic frequencies at basally shifted simulated electrode locations are significantly reduced with training. However, a distortion of frequency-to-place mapping may also arise due to a region of dysfunctional neurons that creates a "hole" in the tonotopic representation. This study simulated a 10 mm hole in the mid-frequency region. Noise-band processors were created with six output bands (three apical and three basal to the hole). The spectral information that would have been represented in the hole was either dropped or reassigned to bands on either side. Such reassignment preserves information but warps the place code, which may in itself impair performance. Normally hearing subjects received three hours of training in two reassignment conditions. Speech recognition improved considerably with training. Scores were much lower in a baseline (untrained) condition where information from the hole region was dropped. A second group of subjects trained in this dropped condition did show some improvement; however, scores after training were significantly lower than in the reassignment conditions. These results are consistent with the view that speech processors should present the most informative frequency range irrespective of frequency misalignment. |
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Authors:
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Matthew W Smith; Andrew Faulkner |
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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: 120 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2006 Dec |
Date Detail:
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Created Date: 2007-01-17 Completed Date: 2007-02-15 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: 4019-30 Citation Subset: IM |
Affiliation:
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Department of Phonetics and Linguistics, UCL, Wolfson House, 4 Stephenson Way, London NW1 2HE, United Kingdom. matthew@phon.ucl.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological* Adolescent Adult Cues Female Hearing* Humans Male Phonetics Speech Perception* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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