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Journal of Speech and Hearing Research Vol.33 808-815 December 1990.
© American Speech-Language-Hearing Association
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Effects of Time Gating and Word Length on Isolated Word-Recognition Performance

Chie H. Craig 1
Byoung W. Kim 1
1 University of Wisconsin-Milwaukee

This study examined the effects of forward time gating and word length on monosyllabic isolated word-recognition performance. Fifty (60-ms) time-gated words were developed from a pre-recorded version (Auditec of St. Louis) of the Northwestern Auditory Test No. 6 (NU-6) List 1, Form A. A total of 358 time-gated items were presented monaurally at 80 db SPL, and time-gated word identification, isolation point, acceptance point, and listener confidence measures were obtained from 20 normally hearing listeners. A comparison of conventional nontime-gated word-recognition scores obtained using the NU-6 List 4, Form C with the time-gated measures revealed that, even upon word offset, listeners recognized time-gated words less frequently and with less confidence. The time-gated findings also demonstrated that word length, based on word duration from onset to offset, significantly influenced real-time recognition performance.

KEY WORDS: time gating, word-recognition, word length, real-time, speech understanding

Submitted on March 20, 1989
Accepted on June 3, 1990


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