Shim Hee-Jeong, Jang Hyo Ryung, Shin Hee Baek, Ko Do-Heung
Graduate Program in Speech and Language Pathology, Hallym University, Chuncheon, South Korea.
Folia Phoniatr Logop. 2015;67(2):90-6. doi: 10.1159/000439379. Epub 2015 Nov 18.
To evaluate esophageal speech quality in patients after total laryngectomy using cepstral, spectral and time-based measures.
The subjects were all males and included 20 total laryngectomy patients and 20 age-matched normal controls. The sustained vowel /a/ was measured using the tools of MDVP (Multi-Dimensional Voice Program) and ADSV (Analysis of Dysphonia in Speech and Voice).
Compared to normal controls, esophageal speakers showed significantly lower values for cepstral peak prominence (CPP) and a low- to high-frequency spectral energy (L/H) ratio, but their mean CPP fundamental frequency (CPP F0) was higher. Highly negative correlations were found between CPP and jitter (percent jitter), shimmer (percent shimmer) and noise-to-harmonics ratio (NHR). Positive correlations were also found between L/H ratio and CPP. CPP F0 showed a positive correlation with F0, shimmer and NHR. In addition, CPP and L/H ratio parameters indicated an area under the curve of 0.93 or higher compared to that for time-based measures.
This study showed that cepstral and spectral analyses are more effective than time-based analysis in examining the voice quality of alaryngeal speakers. The present findings are expected to contribute to establishing the baseline for voice quality characteristics in total laryngectomy patients.
运用谐波倒谱、频谱和基于时间的测量方法评估全喉切除术后患者的食管语音质量。
研究对象均为男性，包括20例全喉切除患者和20例年龄匹配的正常对照者。使用MDVP（多维语音程序）和ADSV（语音和嗓音中发声障碍分析）工具测量持续元音/a/。
与正常对照者相比，食管发音者的谐波峰值突出度（CPP）和低频到高频频谱能量（L/H）比值显著更低，但他们的平均CPP基频（CPP F0）更高。发现CPP与抖动（抖动百分比）、闪烁（闪烁百分比）和噪声与谐波比值（NHR）之间存在高度负相关。L/H比值与CPP之间也存在正相关。CPP F0与F0、闪烁和NHR呈正相关。此外，与基于时间的测量方法相比，CPP和L/H比值参数的曲线下面积表明为0.93或更高。
本研究表明，在检查无喉发音者的嗓音质量方面，谐波倒谱和频谱分析比基于时间的分析更有效。目前的研究结果有望为确立全喉切除患者嗓音质量特征的基线做出贡献。
