OBJECTIVES: 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. METHOD: 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. RESULTS: 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. CONCLUSION: 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.
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机译：目的：据报道，传统的声音障碍测量方法不可靠，并且倒谱峰突出（CPP）的测量结果与呼吸感相关。因此，本研究假设相对于正常对照，具有声节状结节的说话者的倒谱峰会异常减少，因为由于声带闭合不充分，它们的特征是声音嘶哑和呼吸音。方法：使用计算机语音实验室（CSL 4150型）软件对持续元音/ a /的声音进行声学分析。通过CPP的测量对元音进行声学分析。结果：采用独立t检验比较了男性和女性在临床和对照组之间的显着差异。结果显示两组之间的显着差异为P <0.05。关于潜在的病理生理学讨论了获得的结果。结论：本研究调查了声带结节患者的CPP。由于喉部病理的存在导致CPP值降低，解释了临床组的倒谱偏差。
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