边缘性腭咽闭合的语音声学特点研究

Thestudyontheacoustic phoneticfeaturesofmarginalvelopharyngealclosureZhuHongping,SunYonggang,WangGuanghe,etal.SchoolofStomatology,BeijingMedicalUniversity,Beijing100081 Abstract ObjectiveTostudytheacoustic phoneticfeaturesofthecleftpatientswithmargina

目的研究边缘性腭咽闭合患者的语音声学特点。方法应用ＵＳＳＡ语音频谱分析系统，对１７例边缘性腭咽闭合患者的语音声学特点进行了分析，并与２８例腭咽闭合不全患者和１８例腭咽闭合完全患者的语音声学特点进行了对照研究。结果边缘性腭咽闭合患者语句中压力性辅音的语图模式可存在异常或偶见正常，塞音和塞擦音语图上冲直条、空白间隙特征性表现可消失，送气辅音语图的低频区可出现噪音能量，语句元音频谱的低频区可出现额外峰，但单元音的频谱无异常表现。结论声学分析技术对边缘性腭咽闭合有重要的诊断价值。并强调利用声学分析技术来评价腭咽闭合功能时，应同时分析多个元、辅音的声学特点。

Objective To study the acoustic phonetic features of the cleft patients with marginal velopharyngeal closure. Methods The acoustic phonetic features of 17 cleft patients with marginal velopharyngeal closure were analyzed with USSA sound spectrograph, contrasted by the features of 28 cleft patients with velopharyngeal incompetence and 18 patients with velopharyngeal competence. Results The manifestations of single vowel spectrum differ from that of the same vowel in sentence for MVPC patients. There are extra formants or strong nasal formants in a number of vowels spectrums in sentence, while they do not occur on single vowel spectrum. The spike and stop gap in the spectrograms of stops and affricatives may be absent or existing occasionally, and the noise energy in the lowest frequency area in the spectrograms of aspirated consonants may be watched or not. Conclusion Acoustic analysis is very valuable to evaluate the state of marginal velopharyngeal closure. Analyzing the acoustic features of multiple vowels and consonants, and comparing the resonance characteristics of single vowel with the same vowel in continuous speech simultaneously are emphasized.