腭裂伴或不伴高鼻音儿童元音的非线性动力学分析
Nonlinear Dynamic Analysis of Vowels in Cleft Palate Children with or without Hypernasality.
作者信息
Mishima Katsuaki, Nakano Hiroyuki, Matsumura Tatsushi, Moritani Norifumi, Iida Seiji, Ueyama Yoshiya
机构信息
The Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yamaguchi University, Minami-kogushi 1-1-1, Ube City, Yamaguchi 7558505, Japan.
出版信息
Int J Otolaryngol. 2012;2012:739523. doi: 10.1155/2012/739523. Epub 2011 Dec 6.
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 (mLE(1)) from all one-second intervals was computed. Results. The mLE(1) for /o/ in patients with hypernasality was significantly higher than that in patients without hypernasality. The correlation coefficients between the mLE(1) 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.
目的。阐明腭裂（CP）伴高鼻音患者与不伴高鼻音患者的李雅普诺夫指数（LEs）之间的差异，并研究其LEs与鼻音计评分（NSs）之间的关系。材料与方法。纳入6例重度高鼻音CP患者（平均年龄9.2岁）和6例无高鼻音CP患者（平均年龄8.0岁）。以44.1 KHz记录5个日语元音，并同时测量NSs。计算所有1秒间隔的平均第一李雅普诺夫指数（mLE(1)）。结果。高鼻音患者中/o/的mLE(1)显著高于无高鼻音患者。所有元音的mLE(1)与NS之间的相关系数无统计学差异。结论。高鼻音患者的/o/语音信号比无高鼻音患者的更不稳定。CP语音中的混沌现象与鼻腔共鸣无关。
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