摘要
应用计算机语音信号分析技术对１２例腭裂患儿和１１例正常儿童所发普通话汉语元音的特点进行了对比研究。文中讨论了元音共振峰模式改变的意义，并依据两组元音的声学参数绘制了声学元音图。结果表明：舌位及舌面高点向后移动是腭裂患儿普遍存在的发音动作。代偿性舌位后移是产生腭裂语音的重要原因。声学元音图表明：腭裂元音的发音舌位基本相同，因而元音的区别特征减弱，清晰度下降。文章还讨论了腭裂术前和术后腭咽闭合不全与分支声管和共鸣腔共鸣的关系问题，指出腭裂术后一定程度的腭咽闭合不全的存在不是影响语音效果的主要因素，腭裂术后语音训练应加强低元音鼻化的纠正。
Abstract The properties of Chinese vowel of 12 children with cleft palate and 11 controlled children had been studied by computeried speech signal analysing technique. The vowelgraph of both groups have been stated. The difference of spectrograph of two groups was also estimated. The results showed: there was difference at the values of formants of vowels except[a] (P<0.05)for two groups. Because the values of F_2 and F_3 represent the change of tongue position and velopharyngeal orifice respectively, the results suggested that the backward movement of tongue should be a common action for children with cleft palate during vowel phonation. The vowelgraph showed centripetal concentration and decreased perceptual distance for children with cleft palate compare to the controls. The value of F_2 of most children with cleft palate was around 1600 Hz which demonstrate the slmilar tongue shape and position of phonation. The authors concluded that the value of F_2 was an index of correct tongue position and phonation. Minor degree of VPI would not be the main influence factor of speech clearness post-operatively. Correction of nasality of front vowel should be stressed.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
1994年第3期175-179,共5页
West China Journal of Stomatology
