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Journal of Speech and Hearing Research Vol.35 942-949 August 1992.
© American Speech-Language-Hearing Association
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Detection and Recognition of Stop Consonants by Normal.Hearing and Hearing Impaired Listeners

Christopher W. Turner 1
David A. Fabry 2
Stephanie Barrett 1

Amy R. Horwitz 1
1 Communication Sciences and Disorders Syracuse University Syracuse, NY
2 Department of Otorhinolaryngology Mayo Clinic Rochester, MN

This study examined the possibility that hearing-impaired listeners, in addition to displaying poorer-than-normal recognition of speech presented in background noise, require a larger signal-to-noise ratio for the detection of the speech sounds. Psychometric functions for the detection and recognition of stop consonants were obtained from both normal-hearing and hearing-impaired listeners. Expressing the speech levels in terms of their short-term spectra, the detection of consonants for both subject groups occurred at the same signal-to-noise ratio. In contrast, the hearing-impaired listeners displayed poorer recognition performance than the normal-hearing listeners. These results imply that the higher signal-to-noise ratios required for a given level of recognition by some subjects with hearing loss are not due in part to a deficit in detection of the signals in the masking noise, but rather are due exclusively to a deficit in recognition.

KEY WORDS: detection, recognition, consonants, hearing loss

Submitted on July 1, 1991
Accepted on January 2, 1992


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Copyright © 1992 by the American Speech-Language-Hearing Association.