Development of Vocalization in children with Cleft Palate

对唇腭裂哺乳期婴儿哭声的声学特征、鼻腔共振声量及其发育变化进行了研究。未做过手术的儿童，从出生到6个月，每月记录一次哭声。(1)三位语言病理学家听了录音磁带，其中分别记录了唇腭裂(CLP)儿童和同龄单纯唇裂儿童(CLA)的声音，并确定了前者的声音属于哪一类。(2)从声学角度对哭声特征进行了研究。结果：(1)在听力学实验中，直到4个月前患者发出正确声音的百分率都很低。但随着年龄的增长，这一比例有上升的趋势。(2)CLA儿童吸气发声与灵感发声明显配对，呈节律性，吸气发声持续时间明显长于CLP。(3)无Hotz板的CLP患儿鼻音最高，CLA患儿鼻音最低，4个月后差异增大。腭咽闭合不全似乎影响了4个月后哭声的产生。

The sound characteristics of the crying voices and the sound volume of the nasal resonance of the suckling with the cleft lip and/or palate was investigated, as well as changes in their development. The crying voices of the children who had not been operated on were recorded once a month from their birth to 6 months. (1) Three speech pathologists listened to the recording tapes in which the voices of the children with cleft lip and palate (CLP) with or without feeding plate (Hotz plate) and of the child with cleft lip alone (CLA) in the same age are recorded each, and they decided to which category of the voices the former voices belonged to. (2) The characteristics of the crying voice was investigated by sonagraph phonologically. (3) Nasalance was measured by Nasometer (Kay).Results were as follows : (1) In the audiological experiment the percentage change that the patients gave correct sounds was low until the fourth month. But as they got elder the percentage tended to get higher. (2) The voice in the aspiration and those in the inspiration of the child of CLA clearly made pairing and were rythmical, and the duration time of vocalization in a aspiration is longer than CLP clearly. (3) The nasalance of the children with CLP without Hotz plate was the highest, and nasalance of the child with CLA was the lowest.After the fourth month the difference was seen to increase. The velopharyngeal incompetency seems to influence the production of crying sounds after the fourth month.