Department of Audiology and Speech Language Pathology, Kasturba Medical College (Unit of Manipal University), Mangalore, India.
J Voice. 2010 Nov;24(6):651-3. doi: 10.1016/j.jvoice.2009.07.008. Epub 2010 Feb 19.
Traditional measures of dysphonia were reported to be unreliable, and the measurements of cepstral peak prominence (CPP) have been shown to correlate well with perceptions of breathiness. Hence, the present study was hypothesized that there would be abnormal reduction of the cepstral peak in the speakers with vocal nodules relative to the normal controls as they are characterized by hoarse and breathy voice due to inadequate closure of vocal folds.
Phonation of sustained vowel /a/ was subjected to acoustic analysis using Computerized Speech Lab (CSL model 4150) software. The vowels were analyzed acoustically with the measurement of CPP.
Independent t test was employed to compare the significant differences between the clinical and the control groups in both males and females. The results revealed significant differences across the two groups at P<0.05. The obtained results were discussed with respect to the underlying pathophysiology.
The present study investigated the CPP in subjects with vocal nodules. Cepstral deviations in the clinical group are explained due to the presence of laryngeal pathology leading to the lower values of CPP.
传统的发声障碍评估方法并不可靠，而倒频谱峰值突出度（CPP）的测量结果与发声的粗糙感之间存在很好的相关性。因此，本研究假设，由于声带闭合不足，声带小结患者的发声表现为嘶哑和粗糙，其声道的倒频谱峰值会出现异常降低。
采用计算机语音实验室（CSL 型号 4150）软件对持续发/a/音的嗓音进行声学分析。通过 CPP 测量对元音进行声学分析。
采用独立样本 t 检验比较了男女两组患者和对照组之间的显著差异。结果表明，两组间在 P<0.05 时有显著差异。根据潜在的病理生理学对所得结果进行了讨论。
本研究调查了声带小结患者的 CPP。由于存在喉病理学，导致 CPP 值较低，因此临床组的倒频谱偏差可以得到解释。
