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Journal of Speech and Hearing Research Vol.30 80-87 March 1987.
© American Speech-Language-Hearing Association
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Temporal Acoustic Measures of Dysarthria Associated with Amyotrophic Lateral Sclerosis

Anthony J. Caruso 1
Estelle Klasner Burton 2
1 University of Wisconsin-Madison
2 Sewall Rehabilitation Center, Denver, CO

The purpose of this study was to investigate stop-gap duration, voice onset time (VOT), and vowel duration in intelligible speakers with amyotrophic lateral sclerosis (ALS). Broadband sound spectrograms were used to measure 8 normal and 8 ALS speakers' intelligible speech productions of monosyllabic words containing word-initial stop-plosive consonants (/p, t, k, b, d, g/). Significant differences were found between the two groups for both vowel duration and stop-gap duration; moreover, correlational analysis indicated that the ALS speakers, as a group, exhibited a direct relationship between stop-gap and vowel durations associated with productions of /t/ and /k/. No significant differences were found between the two talker groups for VOT. Results will be related to the neuroanatomical and physiological mechanisms involved in dysarthric (ALS) speech.

Submitted on January 17, 1986
Accepted on August 21, 1986


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