Hillenbrand J
RIT Research Corporation, Rochester Institute of Technology, NY 14623-3435.
J Speech Hear Res. 1987 Dec;30(4):448-61. doi: 10.1044/jshr.3004.448.
There is a relatively large body of research that is aimed at finding a set of acoustic measures of voice signals that can be used to: (a) aid in the detection, diagnosis, and evaluation of voice-quality disorders; (b) identify individual speakers by their voice characteristics; or (c) improve methods of voice synthesis. Three acoustic parameters that have received a relatively large share of attention, especially in the voice-disorders literature, are pitch perturbation, amplitude perturbation, and additive noise. The present study consisted of a series of simulations using a general-purpose formant synthesizer that were designed primarily to determine whether these three parameters could be measured independent of one another. Results suggested that changes in any single dimension can affect measured values of all three parameters. For example, adding noise to a voice signal resulted not only in a change in measured signal-to-noise ratio, but also in measured values of pitch and amplitude perturbation. These interactions were quite large in some cases, especially in view of the fact that the perturbation phenomena that are being measured are generally quite small. For the most part, the interactions appear to be readily explainable when the measurement techniques are viewed in relation to what is known about the acoustics of voice production.
有大量的研究旨在寻找一组可用于语音信号的声学测量方法，这些方法能够：(a) 辅助语音质量障碍的检测、诊断和评估；(b) 根据语音特征识别个体说话者；或者 (c) 改进语音合成方法。在语音障碍文献中，尤其受到较多关注的三个声学参数是音高微扰、幅度微扰和加性噪声。本研究由一系列使用通用共振峰合成器的模拟组成，其主要目的是确定这三个参数是否能够相互独立测量。结果表明，任何单一维度的变化都会影响所有三个参数的测量值。例如，向语音信号中添加噪声不仅会导致测量的信噪比发生变化，还会使音高和幅度微扰的测量值发生变化。在某些情况下，这些相互作用相当大，特别是考虑到所测量的微扰现象通常非常小这一事实。在结合已知的语音产生声学知识来审视测量技术时，这些相互作用在很大程度上似乎是易于解释的。
