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KMID : 1022420100020020085
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Phonetics and Speech Sciences
2010 Volume.2 No. 2 p.85 ~ p.92
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Speech Intelligibility in Syllables and Vowel Space according to Dysarthric Severity
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Lee Ok-Bun
Han Ji-Yeon
Park Sang-Hee
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Abstract
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The purpose of this study was to know the differences in perceptual judgement for speech intelligibility in monosyllables by inexperienced listeners and vowel space area according to different dysarthric severity. Three dysarthric speakers with different severity(mild, moderate and severe) screened by 3 clinicians’ screening tests before the experiment were conducted. Corner vowels (i, u, ae, a) in monosyllable level (CVC, ‘p_p’) and carrier phrases (‘종이에 _ 써’) were chosen and analyzed for vowel space. Inexperience listeners (n=20) performed the intelligibility test for spoken syllables and carrier phrases by dysarthric speakers. The results show that there is a significant differences in both F1 and F2 values among 4 corner vowels. Vowel space area in the data of mildly impaired speakers was significantly higher than two others. In the scores of speech intelligibility judged by inexperienced listeners, the scores by a moderately impaired speaker were more higher than two other speakers. The discrepancy between perceptual judgement by inexperienced listeners and vowel space area will be discussed in this area.
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KEYWORD
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speech intelligibility, monosyllables, vowel space, dysarthric severity
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