The resolution of complex spectral patterns by cochlear implant and normal-hearing listeners

Henry, Belinda and Turner, Christopher W. (2003) The resolution of complex spectral patterns by cochlear implant and normal-hearing listeners. The Journal of the Acoustical Society of America, 113 5: 2861-2873. doi:10.1121/1.1561900

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Author Henry, Belinda
Turner, Christopher W.
Title The resolution of complex spectral patterns by cochlear implant and normal-hearing listeners
Journal name The Journal of the Acoustical Society of America   Check publisher's open access policy
ISSN 0001-4966
Publication date 2003-05
Year available 2003
Sub-type Article (original research)
DOI 10.1121/1.1561900
Open Access Status File (Publisher version)
Volume 113
Issue 5
Start page 2861
End page 2873
Total pages 13
Place of publication Melville, NY, United States
Publisher A I P Publishing LLC
Language eng
Subject 320705 Sensory Systems
321025 Rehabilitation and Therapy - Hearing and Speech
380302 Linguistic Processes (incl. Speech Production and Comprehension)
Abstract The differences in spectral shape resolution abilities among cochlear implant ~CI! listeners, and between CI and normal-hearing ~NH! listeners, when listening with the same number of channels ~12!, was investigated. In addition, the effect of the number of channels on spectral shape resolution was examined. The stimuli were rippled noise signals with various ripple frequency-spacings. An adaptive 4IFC procedure was used to determine the threshold for resolvable ripple spacing, which was the spacing at which an interchange in peak and valley positions could be discriminated. The results showed poorer spectral shape resolution in CI compared to NH listeners ~average thresholds of approximately 3000 and 400 Hz, respectively!, and wide variability among CI listeners ~range of approximately 800 to 8000 Hz!. There was a significant relationship between spectral shape resolution and vowel recognition. The spectral shape resolution thresholds of NH listeners increased as the number of channels increased from 1 to 16, while the CI listeners showed a performance plateau at 4–6 channels, which is consistent with previous results using speech recognition measures. These results indicate that this test may provide a measure of CI performance which is time efficient and non-linguistic, and therefore, if verified, may provide a useful contribution to the prediction of speech perception in adults and children who use CIs.
Keyword Sensory perception
Speech analysis
Speech recognition
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Health and Rehabilitation Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 73 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 27 Mar 2007, 21:50:06 EST by Kathleen Reinhardt on behalf of Faculty Of Health Sciences