| Effects of electrode separation between speech and noise signals on consonant identification in cochlear implants. | |
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MedLine Citation:
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PMID: 20000939 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of the present study was to examine cochlear implant (CI) users' perceptual segregation of speech from background noise with differing degrees of electrode separation between speech and noise. Eleven users of the nucleus CI system were tested on consonant identification using an experimental processing scheme called "multi-stream processing" in which speech and noise stimuli were processed separately and interleaved. Speech was presented to either ten (every other electrode) or six electrodes (every fourth electrode). Noise was routed to either the same (the "overlapped" condition) or a different set of electrodes (the "interlaced" condition), where speech and noise electrodes were separated by one- and two-electrode spacings for ten- and six-electrode presentations, respectively. Results indicated a small but significant improvement in consonant recognition (5%-10%) in the interlaced condition with a two-electrode spacing (approximately 1.1 mm) in two subjects. It appears that the results were influenced by peripheral channel interactions, partially accounting for individual variability. Although the overall effect was small and observed from a small number of subjects, the present study demonstrated that CI users' performance on segregating the target from the background might be improved if these sounds were presented with sufficient peripheral separation. |
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Authors:
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Bom Jun Kwon |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 126 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2009-12-16 Completed Date: 2010-02-24 Revised Date: 2011-09-30 |
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: 3258-67 Citation Subset: IM |
Affiliation:
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Department of Communication Sciences and Disorders, University of Utah, 390 S 1530 E, Salt Lake City, Utah 84112, USA. bjkwon@gmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Aged Aged, 80 and over Auditory Perception* Cochlear Implants* Female Humans Male Middle Aged Noise Pattern Recognition, Physiological* Phonetics* Signal Processing, Computer-Assisted / instrumentation Speech Speech Perception* |
| Grant Support | |
ID/Acronym/Agency:
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R03 DC009061-01A1/DC/NIDCD NIH HHS; R03DC009061/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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