抄録
Objective: The purpose of this study was to explore the possibility of using Lyapunov exponents (LE) to evaluate the voice and speech in cleft palate (CP) patients. Subjects and Methods: Fifty healthy adults (25 males and 25 females) and 17 adult patients (10 males and 7 females) with repaired CP, who had no hypernasality, were enrolled. Five Japanese vowels were recorded at 44.1 kHz. Nasalance scores were measured simultaneously. The first LE was computed for each 1-second interval, and the mean for the first LE from all intervals (mLE1) was then calculated. The delay time and embedding dimension were estimated at 13, 40, 34, 27 and 22 points for the vowels /a/, /i/, /u/, /e/ and /o/, respectively, and at 8 points for all vowels. Results: The mLE 1s for all vowels did not differ between normal males and females. The mLE1s for /a/ were significantly higher both in males and females with CP than in normal individuals. The correlation coefficient between the mLE1s and nasalance scores for all vowels was not significant for both normal and CP subjects. Conclusion: The LE seemed to be related to pathological disorders of the vocal cords in CP patients, but was independent of resonance parameters.
| 元の言語 | 英語 |
|---|---|
| ページ（範囲） | 129-133 |
| ページ数 | 5 |
| ジャーナル | Folia Phoniatrica et Logopaedica |
| 巻 | 63 |
| 発行部数 | 3 |
| DOI | |
| 出版物ステータス | 出版済み - 4 1 2011 |
| 外部発表 | Yes |
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All Science Journal Classification (ASJC) codes
- Language and Linguistics
- Linguistics and Language
- Speech and Hearing
- LPN and LVN
これを引用
Lyapunov exponents for japanese vowels in normal adult and cleft palate speakers. / Mishima, Katsuaki; Sugii, Asuka; Yamada, Tomohiro; Matsumura, Tatsushi; Moritani, Norifumi.
：: Folia Phoniatrica et Logopaedica, 巻 63, 番号 3, 01.04.2011, p. 129-133.研究成果: ジャーナルへの寄稿 › 記事
}
TY - JOUR
T1 - Lyapunov exponents for japanese vowels in normal adult and cleft palate speakers
AU - Mishima, Katsuaki
AU - Sugii, Asuka
AU - Yamada, Tomohiro
AU - Matsumura, Tatsushi
AU - Moritani, Norifumi
PY - 2011/4/1
Y1 - 2011/4/1
N2 - Objective: The purpose of this study was to explore the possibility of using Lyapunov exponents (LE) to evaluate the voice and speech in cleft palate (CP) patients. Subjects and Methods: Fifty healthy adults (25 males and 25 females) and 17 adult patients (10 males and 7 females) with repaired CP, who had no hypernasality, were enrolled. Five Japanese vowels were recorded at 44.1 kHz. Nasalance scores were measured simultaneously. The first LE was computed for each 1-second interval, and the mean for the first LE from all intervals (mLE1) was then calculated. The delay time and embedding dimension were estimated at 13, 40, 34, 27 and 22 points for the vowels /a/, /i/, /u/, /e/ and /o/, respectively, and at 8 points for all vowels. Results: The mLE 1s for all vowels did not differ between normal males and females. The mLE1s for /a/ were significantly higher both in males and females with CP than in normal individuals. The correlation coefficient between the mLE1s and nasalance scores for all vowels was not significant for both normal and CP subjects. Conclusion: The LE seemed to be related to pathological disorders of the vocal cords in CP patients, but was independent of resonance parameters.
AB - Objective: The purpose of this study was to explore the possibility of using Lyapunov exponents (LE) to evaluate the voice and speech in cleft palate (CP) patients. Subjects and Methods: Fifty healthy adults (25 males and 25 females) and 17 adult patients (10 males and 7 females) with repaired CP, who had no hypernasality, were enrolled. Five Japanese vowels were recorded at 44.1 kHz. Nasalance scores were measured simultaneously. The first LE was computed for each 1-second interval, and the mean for the first LE from all intervals (mLE1) was then calculated. The delay time and embedding dimension were estimated at 13, 40, 34, 27 and 22 points for the vowels /a/, /i/, /u/, /e/ and /o/, respectively, and at 8 points for all vowels. Results: The mLE 1s for all vowels did not differ between normal males and females. The mLE1s for /a/ were significantly higher both in males and females with CP than in normal individuals. The correlation coefficient between the mLE1s and nasalance scores for all vowels was not significant for both normal and CP subjects. Conclusion: The LE seemed to be related to pathological disorders of the vocal cords in CP patients, but was independent of resonance parameters.
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UR - http://www.scopus.com/inward/citedby.url?scp=77957729361&partnerID=8YFLogxK
U2 - 10.1159/000316322
DO - 10.1159/000316322
M3 - Article
C2 - 20938192
AN - SCOPUS:77957729361
VL - 63
SP - 129
EP - 133
JO - Folia Phoniatrica et Logopaedica
JF - Folia Phoniatrica et Logopaedica
SN - 1021-7762
IS - 3
ER -