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KMID : 0917520000070030197
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Journal of Speech Sciences
2000 Volume.7 No. 3 p.197 ~ p.217
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A Simulation Study of the Vocal Tract in Tracheoesophageal Speaker
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kim, Cheol Soo
Wang, Soo Geun/Roh, Hwan Jung/Goh, Eui Kyung/Chon, Kyong Myong/Lee, Byung Joo/Kwon, Soon Bok
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Abstract
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The vocal tract shapes were measured from tracheoesophageal speakers during the sustained phonation of five Korean vowels /u/, /o/, /a/, /e/, /i/ using magnetic resonance image(MRI). The subject´s original vowel utterances with speech intelligibility and the synthesized vowels from MR images were analyzed. The results were as follows: (1) The vowels /a/, /e/, /i/ were percived as the same sounds of actual subject´s speech, but the vowels /o/ and /u/ were perceived as /??/ and strained /u/, respectively. (2) The synthesized vowels /a/ and /e/ from the MR images were perceived as the same sounds, but the vowels /u/, /o/, /i/ were perceived as different sounds. (3) The synthesized vowel by the expanded pharyngeal segment of 3 times in vowel /o/ was perceived as more natural than that of 2 time. The pharyngeal areas with varied sizes should be experimented to secure better speech production because the correct shapes of the vocal tract lead to distinct vowel production.
Keywords : Vocal tract, MRI, Vowel synthesis, Total laryngectomy, Tracheoesophagcal speaker
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