Nonlinear Dynamic Analysis of Vowels in Cleft Palate Children with or without Hypernasality
Objectives. To clarify the difference between Lyapunov exponents (LEs) for cleft palate (CP) patients with hypernasality versus without hypernasality and to investigate the relationship between their LEs and nasalance scores (NSs). Material and Methods. Six CP patients with severe hypernasality (mea...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2012-01-01
|
Series: | International Journal of Otolaryngology |
Online Access: | http://dx.doi.org/10.1155/2012/739523 |
id |
doaj-315bc57cdfe5481184371799ff8c0ab6 |
---|---|
record_format |
Article |
spelling |
doaj-315bc57cdfe5481184371799ff8c0ab62020-11-24T22:15:40ZengHindawi LimitedInternational Journal of Otolaryngology1687-92011687-921X2012-01-01201210.1155/2012/739523739523Nonlinear Dynamic Analysis of Vowels in Cleft Palate Children with or without HypernasalityKatsuaki Mishima0Hiroyuki Nakano1Tatsushi Matsumura2Norifumi Moritani3Seiji Iida4Yoshiya Ueyama5The Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yamaguchi University, Minami-kogushi 1-1-1, Ube City, Yamaguchi 7558505, JapanThe Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yamaguchi University, Minami-kogushi 1-1-1, Ube City, Yamaguchi 7558505, JapanThe Department of Oral and Maxillofacial Reconstructive Surgery, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Shikata-cho 2-5-1, Okayama City, Okayama 7008525, JapanThe Department of Oral and Maxillofacial Reconstructive Surgery, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Shikata-cho 2-5-1, Okayama City, Okayama 7008525, JapanThe Department of Oral and Maxillofacial Reconstructive Surgery, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Shikata-cho 2-5-1, Okayama City, Okayama 7008525, JapanThe Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yamaguchi University, Minami-kogushi 1-1-1, Ube City, Yamaguchi 7558505, JapanObjectives. To clarify the difference between Lyapunov exponents (LEs) for cleft palate (CP) patients with hypernasality versus without hypernasality and to investigate the relationship between their LEs and nasalance scores (NSs). Material and Methods. Six CP patients with severe hypernasality (mean age 9.2 years) and six CP patients without hypernasality (mean age 8.0 years) were enrolled. Five Japanese vowels were recorded at 44.1 KHz, and the NSs were measured simultaneously. The mean first LE (mLE1) from all one-second intervals was computed. Results. The mLE1 for /o/ in patients with hypernasality was significantly higher than that in patients without hypernasality. The correlation coefficients between the mLE1 and NS for all vowels were not statistically different. Conclusion. The voice signal of /o/ for the patients with hypernasality was more instable than in those without hypernasality. The chaotic phenomenon was independent of nasal resonance in CP voice.http://dx.doi.org/10.1155/2012/739523 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Katsuaki Mishima Hiroyuki Nakano Tatsushi Matsumura Norifumi Moritani Seiji Iida Yoshiya Ueyama |
spellingShingle |
Katsuaki Mishima Hiroyuki Nakano Tatsushi Matsumura Norifumi Moritani Seiji Iida Yoshiya Ueyama Nonlinear Dynamic Analysis of Vowels in Cleft Palate Children with or without Hypernasality International Journal of Otolaryngology |
author_facet |
Katsuaki Mishima Hiroyuki Nakano Tatsushi Matsumura Norifumi Moritani Seiji Iida Yoshiya Ueyama |
author_sort |
Katsuaki Mishima |
title |
Nonlinear Dynamic Analysis of Vowels in Cleft Palate Children with or without Hypernasality |
title_short |
Nonlinear Dynamic Analysis of Vowels in Cleft Palate Children with or without Hypernasality |
title_full |
Nonlinear Dynamic Analysis of Vowels in Cleft Palate Children with or without Hypernasality |
title_fullStr |
Nonlinear Dynamic Analysis of Vowels in Cleft Palate Children with or without Hypernasality |
title_full_unstemmed |
Nonlinear Dynamic Analysis of Vowels in Cleft Palate Children with or without Hypernasality |
title_sort |
nonlinear dynamic analysis of vowels in cleft palate children with or without hypernasality |
publisher |
Hindawi Limited |
series |
International Journal of Otolaryngology |
issn |
1687-9201 1687-921X |
publishDate |
2012-01-01 |
description |
Objectives. To clarify the difference between Lyapunov exponents (LEs) for cleft palate (CP) patients with hypernasality versus without hypernasality and to investigate the relationship between their LEs and nasalance scores (NSs). Material and Methods. Six CP patients with severe hypernasality (mean age 9.2 years) and six CP patients without hypernasality (mean age 8.0 years) were enrolled. Five Japanese vowels were recorded at 44.1 KHz, and the NSs were measured simultaneously. The mean first LE (mLE1) from all one-second intervals was computed. Results. The mLE1 for /o/ in patients with hypernasality was significantly higher than that in patients without hypernasality. The correlation coefficients between the mLE1 and NS for all vowels were not statistically different. Conclusion. The voice signal of /o/ for the patients with hypernasality was more instable than in those without hypernasality. The chaotic phenomenon was independent of nasal resonance in CP voice. |
url |
http://dx.doi.org/10.1155/2012/739523 |
work_keys_str_mv |
AT katsuakimishima nonlineardynamicanalysisofvowelsincleftpalatechildrenwithorwithouthypernasality AT hiroyukinakano nonlineardynamicanalysisofvowelsincleftpalatechildrenwithorwithouthypernasality AT tatsushimatsumura nonlineardynamicanalysisofvowelsincleftpalatechildrenwithorwithouthypernasality AT norifumimoritani nonlineardynamicanalysisofvowelsincleftpalatechildrenwithorwithouthypernasality AT seijiiida nonlineardynamicanalysisofvowelsincleftpalatechildrenwithorwithouthypernasality AT yoshiyaueyama nonlineardynamicanalysisofvowelsincleftpalatechildrenwithorwithouthypernasality |
_version_ |
1725793850876755968 |