28例先天性腭咽闭合功能不全的音声特点分析

The Study on the Acoustic Features of Congenital Velopharyngeal Insufficiency in 28 Patients

目的研究先天性腭咽闭合功能不全型(CVPI)患者的音声学特点。方法应用计算机语音工作站对28例CVPI患者和20例正常人的音声学特点进行分析。结果先天性腭咽闭合功能不全型患者和正常人在被检音的F2、B2、F3和B3上有显著差别(P﹤0.05),不同被检音结果有差别。正常组的F1、F2和F3清晰可见,各共振峰之间着色较浅,能量集中,冲直条和乱纹明显,辅音起声时间较长。病例组的F1颜色略深、宽度加大,F2、F3不很清楚,较正常组的位置低、弱化和加宽,在各共振峰之间出现若干能量集中区,着色较深,形成多余共振峰。位于元音之前的冲直条和乱纹大大减少。结论CVPI患者在第2、3共振峰和带宽上与正常组有显著性差异,在语图上也有相应的特点。

Objective To study the acoustic features of the patients with congenital velopharyngeal insufficiency (CVPI). Methods The acoustic features of 28 patients with CVPI were analyzed with the computer speech lab, contrasted by the features of 20 controls. Results There was significant difference in F2, B2, F3, B3 and VOT between the patients and the controls (P<0.05). It was not same on every syllable; From phonetic images, F1, F2 and F3 of the controls were more clear than those of the patients, the other districts of the controls were lighter than those of the patients. F1 of the patients was darker and broader, their F2 and F3 were lower, weaker and broader. Among F1, F2 and F3 of the patients, there were some extra FORMANTs. Erected stripes and fills before the vowel of the patients were fewer than those of the controls. Conclusions There were apparent distinctions in F2, B2, F3 and B3 between the patients and the controls, and there was significant difference in phonetic images of two groups, especially in FORMANTs,and consonants.