Relationships between the perception of nasalization and speech movements in speakers with cleft palate.
Relationships between the perception of nasalization and speech movements in speakers with cleft palate.
复制标题
腭裂说话者的鼻化感知和言语运动之间的关系。
DOI：
10.1044/jshr.2801.63
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
Morris,HL
中科院分区：
文献类型：
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作者：
Karnell,MP;Folkins,JW;Morris,HL
本研究的目的是研究腭裂说话者言语运动的几个时间测量与感知鼻化之间的关系。使用高速（100帧/秒）电影荧光摄影技术，对4名腭裂修复的成人受试者在产生嵌入载体短语的目标音节时进行了拍摄。每个抽取的目标音节的感知鼻音由18名训练有素的法官评定。舌尖、舌背、下颚、掌膝、掌尖和咽后壁的运动随时间变化而变化。从图中确定运动开始时间和运动偏移量。声音开始和偏移时间从同步录音中确定。研究结果表明，在两名被判断为高度鼻化的受试者中，在鼻化CVC和CVN产生过程中，正常预期的腭咽运动发生在下颌下降的时间附近。另外两名受试者在CVC产生过程中无腭咽运动。据推测，在CVC话语中通常预期的腭咽运动可能会被一些腭裂说话者避免，以尽量减少可感知的鼻音。
The purpose of this study was to examine the relationships between several temporal measures of speech movements and perceived nasalization in speakers with cleft palate. Four adult subjects with repaired cleft palate were filmed using high-speed (100 frames/s) cinefluorography as they produced target syllables embedded in a carrier phrase. Perceived nasalization of each extracted acoustic target syllable was rated by 18 trained judges. Movements of the tongue tip, tongue dorsum, jaw, velar knee, velar tip, and posterior pharyngeal wall were plotted over time. Time of movement onsets and movement offsets was identified from the plots. Voice onset and offset times were identified from the synchronized acoustic recordings. The findings indicate that normally expected velopharyngeal movements occurred near the time of jaw-lowering onset during nasalized CVC and CVN productions in two subjects who were judged to exhibit high levels of nasalization. The other two subjects showed no velopharyngeal movements during the CVC production. It is speculated that velopharyngeal movements normally expected in CVC utterances may be avoided by some speakers with cleft palate in order to minimize perceptible nasalization.