非腭咽闭合不全型腭裂语音的音声特点

Acoustic characteristics of misarticulation in patients without velopharyngeal incompetence

目的 研究非腭咽闭合不全型腭裂语音的音声特点。方法 采集68例非腭咽闭合不全型腭裂语音、30例腭咽闭合不全型腭裂语音和30例正常语音样本,测量其共振峰频率、带宽、音高、音强等声学特性值以及其语音清晰度。并进行对比分析。结果 非腭咽闭合不全型腭裂语音的8项声学特性值和正常组均有显著差异(P<0.01),其语音清晰度为75.48％,明显高于腭咽闭合不全型腭裂语音(35.00％)。结论 非腭咽闭合不全型腭裂语音和正常语音有着不同的声学本质,其语音清晰度较腭咽闭合不全型腭裂语音为高。

Objective To investigate the acoustic characteristics of misarticulation with adequate velopharyngeal function and compute its speech intelligibility, and compare them with palatalized misarticulation. Methods The systematic studies included 68 misarticulation patients with adequate velopharyngeal function, 30 with velopharyngeal incompetence and 30 normal subjects, by methods of LPC and FFT with computerized speech lab. The formant frequency and speech intelligibilities were tested. Results There were significant different spectral properties between misarticulation with adequate velopharyngeal function and normal articulation(P <0. 01) , and the speech intelligebility of misarticulation with adequate velopharyngeal function averaged 75.48% ,significantly higher (P <0. 001) than misarticulation with velopharyngeal incompetence. Conclusion Misarticulation with adequate velopharyngeal function is different from misarticulation with velopharyngeal incompetence, so they should be clinically treated in different ways.