| Effect of stimulation rate on cochlear implant users' phoneme, word and sentence recognition in quiet and in noise. | |
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MedLine Citation:
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PMID: 20639631 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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High stimulation rates in cochlear implants (CI) offer better temporal sampling, can induce stochastic-like firing of auditory neurons and can increase the electric dynamic range, all of which could improve CI speech performance. While commercial CI have employed increasingly high stimulation rates, no clear or consistent advantage has been shown for high rates. In this study, speech recognition was acutely measured with experimental processors in 7 CI subjects (Clarion CII users). The stimulation rate varied between (approx.) 600 and 4800 pulses per second per electrode (ppse) and the number of active electrodes varied between 4 and 16. Vowel, consonant, consonant-nucleus-consonant word and IEEE sentence recognition was acutely measured in quiet and in steady noise (+10 dB signal-to-noise ratio). Subjective quality ratings were obtained for each of the experimental processors in quiet and in noise. Except for a small difference for vowel recognition in quiet, there were no significant differences in performance among the experimental stimulation rates for any of the speech measures. There was also a small but significant increase in subjective quality rating as stimulation rates increased from 1200 to 2400 ppse in noise. Consistent with previous studies, performance significantly improved as the number of electrodes was increased from 4 to 8, but no significant difference showed between 8, 12 and 16 electrodes. Altogether, there was little-to-no advantage of high stimulation rates in quiet or in noise, at least for the present speech tests and conditions. |
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Authors:
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Robert V Shannon; Rachel J Cruz; John J Galvin |
Publication Detail:
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Type: Clinical Trial; Journal Article; Multicenter Study; Research Support, N.I.H., Extramural Date: 2010-07-17 |
Journal Detail:
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Title: Audiology & neuro-otology Volume: 16 ISSN: 1421-9700 ISO Abbreviation: Audiol. Neurootol. Publication Date: 2011 |
Date Detail:
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Created Date: 2011-01-21 Completed Date: 2011-04-25 Revised Date: 2012-01-02 |
Medline Journal Info:
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Nlm Unique ID: 9606930 Medline TA: Audiol Neurootol Country: Switzerland |
Other Details:
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Languages: eng Pagination: 113-23 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 S. Karger AG, Basel. |
Affiliation:
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House Ear Institute, Communications and Auditory Neuroscience, Los Angeles, CA 90057-1922, USA. shannon@hei.org |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adult Cochlear Implants* Deafness / rehabilitation, therapy* Electric Stimulation / methods* Electrodes, Implanted Female Humans Male Middle Aged Noise Phonetics* Speech Discrimination Tests Speech Perception / physiology* |
| Grant Support | |
ID/Acronym/Agency:
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5 R01 DC01526/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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