Madill Catherine, Nguyen Duong Duy, Yick-Ning Cham Kristie, Novakovic Daniel, McCabe Patricia
Voice Research Laboratory, The University of Sydney, Sydney, New South Wales, Australia.
Faculty of Health Sciences and the Central Clinical School, The University of Sydney, Sydney, New South Wales, Australia.
Laryngoscope. 2019 Aug;129(8):E299-E304. doi: 10.1002/lary.27685. Epub 2018 Dec 25.
OBJECTIVES/HYPOTHESIS: Cepstral peak prominence (CPP) has been reported as a reliable measure of dysphonia and a preferred alternative to harmonics-to-noise ratio (HNR). However, CPP has been observed to be sensitive to articulatory variation and vocal intensity. The aim of this study was to examine the impact of nasalance on CPP and HNR of voice signals. It was hypothesized that increased nasalance would be associated with decreased CPP.
Within-subject correlation design.
Thirty vocally healthy female participants were recorded reading and producing a vowel in alternation with a nasal consonant while wearing a nasometer for calculation of nasalance. Recorded vowel, nasalized, and nasal segments of speech were used to calculate CPP using Analysis of Dysphonia in Speech and Voice software, and HNR and vocal intensity using Praat software.
Significant main effects of conditions were observed for CPP. CPP values decreased significantly when phonation changed from vowel to nasalized vowel and to nasal. There was correlation between CPP and nasalance and between CPP and intensity. HNR was slightly higher in the nasal condition than in vowel. There was a weak correlation between HNR and nasalance. No correlation was found between HNR and intensity.
CPP is sensitive to changes in vocal tract configuration caused by nasalization as well as intensity, whereas HNR is not. Therefore, CPP may reflect the periodicity in source signal or the filtering effects of vocal tract. Further research is needed to clarify the application and interpretation of CPP in clinical practice.
4 Laryngoscope, 129:E299-E304, 2019.
目的/假设：谐波峰值突出度（CPP）已被报道为一种可靠的嗓音障碍测量指标，是谐波噪声比（HNR）的首选替代指标。然而，已观察到CPP对发音变化和嗓音强度敏感。本研究的目的是探讨鼻音对语音信号CPP和HNR的影响。研究假设为鼻音增加会与CPP降低相关。
受试者内相关性设计。
30名嗓音健康的女性参与者在佩戴鼻流量计以计算鼻音时，交替朗读并发出一个元音和一个鼻辅音。使用语音和嗓音障碍分析软件计算录制的元音、鼻化音和鼻音语音片段的CPP，使用Praat软件计算HNR和嗓音强度。
观察到CPP存在显著的条件主效应。当发声从元音变为鼻化元音再变为鼻音时，CPP值显著降低。CPP与鼻音以及CPP与强度之间存在相关性。鼻音条件下的HNR略高于元音条件下的。HNR与鼻音之间存在弱相关性。未发现HNR与强度之间存在相关性。
CPP对鼻化以及强度引起的声道构型变化敏感，而HNR则不然。因此，CPP可能反映源信号的周期性或声道的滤波效应。需要进一步研究以阐明CPP在临床实践中的应用和解释。
4 喉镜，129:E299 - E304，2019年。
