| Relative importance of temporal information in various frequency regions for consonant identification in quiet and in noise. | |
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MedLine Citation:
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PMID: 15478433 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The relative importance of temporal information in broad spectral regions for consonant identification was assessed in normal-hearing listeners. For the purpose of forcing listeners to use primarily temporal-envelope cues, speech sounds were spectrally degraded using four-noise-band vocoder processing Frequency-weighting functions were determined using two methods. The first method consisted of measuring the intelligibility of speech with a hole in the spectrum either in quiet or in noise. The second method consisted of correlating performance with the randomly and independently varied signal-to-noise ratio within each band. Results demonstrated that all bands contributed equally to consonant identification when presented in quiet. In noise, however, both methods indicated that listeners consistently placed relatively more weight upon the highest frequency band. It is proposed that the explanation for the difference in results between quiet and noise relates to the shape of the modulation spectra in adjacent frequency bands. Overall, the results suggest that normal-hearing listeners use a common listening strategy in a given condition. However, this strategy may be influenced by the competing sounds, and thus may vary according to the context. Some implications of the results for cochlear implantees and hearing-impaired listeners are discussed. |
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Authors:
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Frédéric Apoux; Sid P Bacon |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 116 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2004 Sep |
Date Detail:
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Created Date: 2004-10-13 Completed Date: 2005-05-17 Revised Date: 2007-11-14 |
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: 1671-80 Citation Subset: IM |
Affiliation:
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Psychoacoustics Laboratory, Department of Speech and Hearing Science, Arizona State University, Tempe, Arizona 85287-0102, USA. frederic.apoux@asu.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation* Adult Analysis of Variance Audiometry, Speech Auditory Cortex / physiology* Female Humans Male Noise* Speech Perception / physiology* |
| Grant Support | |
ID/Acronym/Agency:
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DC01376/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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