A Study About Acoustical Analysis Of Evaluating Hypernasality In Cleft-Palate Speech

我们选择了10名7-12岁的腭裂儿童，手术后有腭咽闭合不全，并选择10名发音正常的同龄儿童作为对照组。分析/i/在唇裂组，在对照组分析/i/和/i^-/(前面有/m/)。方法是得到(1)发声的频率成分，(2)鼻音振动的频率成分。(Believied by(2)的商是指摆动的速率。发声样本也由三名熟练的临床医生进行声学判断。通过比较频率和声学-心理判断，我们检验了这两种方法。结果如下：1.腭裂患儿的元音/i/嗓音频谱与正常儿童相似。然而，鼻部摆动的频率不同，它们比正常情况下的/i^-/更强。2.鼻部摆动的频率与声学-心理判断高度一致。我们认为，鼻摆率是一种有用的方法，作为临床评估腭裂的过度鼻音。我们希望收集更多合适的样本来制定评估标准。

We selected 10 cleft-palate children aged 7-12, surgically operated but had velopharyngeal incompetency, and as a control group, 10 children with normal phonation of corresponding ages. We analyzed /i/ in cleft group, and /i/ and /i^^-/( preceded by /m/) in control group. The method was to get (1) frequency components of phonation, and (2) those of nasal oscillation. The quotient of (belivided by (2) meant the rate of oscillation. The phonation samples were also judged acoustically by three skilled clinicians. Comparing frequency rates and acoustic-psychological judgments, we examined these two methods. The results were as follows:I. Voice spectrums of vowel /i/ in cleft-palate children were similar to those of the normal. Those of nasal oscillation, however, were different, and they were stronger than /i^^-/ in the normal.II. Rates of nasal oscillations agreed highly with acoustic-psycological judgments. We concluded that rate of nasal oscillation was useful as a method of clinical evaluation of cleft-palate hypernasality. We hope to collect more appropriate samples to develop evaluation criteria.