Effects of moderate cochlear hearing loss on the ability to benefit from temporal fine structure information in speech
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- Kathryn Hopkins
- University of Cambridge Department of Experimental Psychology, , Downing Street, Cambridge CB2 3EB, United Kingdom
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- Brian C. J. Moore
- University of Cambridge Department of Experimental Psychology, , Downing Street, Cambridge CB2 3EB, United Kingdom
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- Michael A. Stone
- University of Cambridge Department of Experimental Psychology, , Downing Street, Cambridge CB2 3EB, United Kingdom
説明
<jats:p>Speech reception thresholds (SRTs) were measured with a competing talker background for signals processed to contain variable amounts of temporal fine structure (TFS) information, using nine normal-hearing and nine hearing-impaired subjects. Signals (speech and background talker) were bandpass filtered into channels. Channel signals for channel numbers above a “cut-off channel” (CO) were vocoded to remove TFS information, while channel signals for channel numbers of CO and below were left unprocessed. Signals from all channels were combined. As a group, hearing-impaired subjects benefited less than normal-hearing subjects from the additional TFS information that was available as CO increased. The amount of benefit varied between hearing-impaired individuals, with some showing no improvement in SRT and one showing an improvement similar to that for normal-hearing subjects. The reduced ability to take advantage of TFS information in speech may partially explain why subjects with cochlear hearing loss get less benefit from listening in a fluctuating background than normal-hearing subjects. TFS information may be important in identifying the temporal “dips” in such a background.</jats:p>
収録刊行物
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- The Journal of the Acoustical Society of America
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The Journal of the Acoustical Society of America 123 (2), 1140-1153, 2008-02-01
Acoustical Society of America (ASA)