Development and perceptual evaluation of amplitude-based F0 control in electrolarynx speech.
Development and perceptual evaluation of amplitude-based F0 control in electrolarynx speech.
复制标题
DOI：
10.1044/1092-4388(2009/08-0167
复制
发表时间：
2009-10
期刊：
影响因子：
--
通讯作者：
Yoko Saikachi;K. Stevens;R. Hillman
中科院分区：
文献类型：
--
作者：
Yoko Saikachi;K. Stevens;R. Hillman
目前的电子喉（EL）设备产生的机械语音质量主要归因于缺乏自然基频（F0）变化。为了提高EL语音的质量，在本研究中，作者的目的是开发和评估一种自动F0控制方案，其中F0调制的基础上的EL语音信号的均方根（RMS）幅度的变化。方法记录2名男性参与者在全喉切除术前后产生的陈述句，用于开发计算EL语音F0轮廓的程序。具体而言，在喉切除术前语音中观察到的F0和RMS幅度之间的正线性关系被用作基于EL语音的幅度变化生成F0轮廓的基础。一个分析合成的方法被用来修改的F0轮廓，并进行了感知实验，以检查其对EL语音质量的影响。结果听觉实验结果表明，用幅度与频率的线性关系调制EL语音的F0，使其听起来明显比F0恒定的EL语音更自然。结论：本研究为基于幅度的EL语音F0控制提供了初步支持。
PURPOSE Current electrolarynx (EL) devices produce a mechanical speech quality that has been largely attributed to the lack of natural fundamental frequency (F0) variation. In order to improve the quality of EL speech, in the present study the authors aimed to develop and evaluate an automatic F0 control scheme, in which F0 was modulated based on variations in the root-mean-square (RMS) amplitude of the EL speech signal. METHOD Recordings of declarative sentences produced by 2 male participants before and after total laryngectomy were used to develop procedures for calculating F0 contours for EL speech. Specifically, the positive linear relationship between F0 and RMS amplitude observed in pre-laryngectomy speech was used as the basis for generating an F0 contour based on the amplitude variation of EL speech. An analysis-by-synthesis approach was used to modify the F0 contour, and a perceptual experiment was conducted to examine its impact on the quality of the EL speech. RESULTS The results of perceptual experiments showed that modulating the F0 of EL speech using a linear relationship between amplitude and frequency made it significantly more natural sounding than EL speech with constant F0. CONCLUSIONS The current study provides preliminary support for amplitude-based control of F0 in EL speech.