Development for Evaluation of Pathological Voices (rough, voice tremor) aimed to support of Clinical Inspection.

在本文中。研究了基频f_0的波动对粗糙声和颤抖声两种音质病理鉴别的影响。本研究的目的是在f_0波动的基础上，探讨声学特征与心理声学判断之间的关系。为“喉科医生”研制了病理声音的声印象训练系统和声音诊断设备（临床检查）。现将本研究的程序及发现总结如下。(1)对基频（f_0）时间序列波动谱域特征形状的谱峰特征进行了声学心理评价为“主要是粗糙和声音震颤”的病理性声音的检测。(2)系统组合调制参数，生成f_0波动调制的合成元音/a/ （FM模型）。而f_0波动的时间序列可以用“坡峰模型”作为一阶近似来生成。同时，利用每个模型分别生成具有F _0波动的合成元音/a/。受试者被要求听合成声音并评估心理声学类别（粗糙和声音颤抖）。得到了以下结果：(1)找出各模型（“FM”和“Slope-Peak”模型）参数与病理声音类别之间的关系。(2)“喉科医生”的声印象训练系统和病理嗓音临床检查系统在实际临床检查中具有吸引力。这些结果对医学电子学和生物工程，以及语音的临床检查都有一定的参考价值。

In this paper. Author investigated effect of the fluctuation of fundamental frequency (F _0) on the identification of pathological of two kinds of voice qualities, rough and voice tremor.The aim of this study is to examine the relationships between the acoustic characteristics and psychoacoustic judgment on the basis of the fluctuation of F _0.And the acoustic impression training system and voice diagnosis equipment (clinical examination) of pathological voices for the "laryngologists" were developed.The procedures and finding in this study are summerized as follows.(1) Characteristics of spectral peakes of characteristics shapes in spectrum domein of fluctuations of the time series, for fundamental frequency (F _0), were examined for a pathological voice which was psychoacoustically evaluated as "mainly rough and voice tremor".(2) Synthetic vowels/a/with frequency modulated F _0 fluctuation (FM model) were generated for systematic combination of modulation parameters.And the time series of fluctuations of F _0 can be generated from the "Slope-Peak model" as the first-order approximation.Also, by using the each model, synthetic vowel/a/with F _0 fluctuation were generated respectively.Subjects were asked to listen to synthetic voices and evaluated pyschoacoustic categories (rough and voice tremor).The following results were obtained.(1) Relationships between the parameters for each model ( "FM" and "Slope-Peak" model) and the categories for the pathological voices were found.(2) The acoustic impression training system and voice clinical examination system of pathological voice for "laryngologists" would be attractive in actual clinical inspection.These results would be usefull for medical electronics and biological engineering, also to clinical examination of voice.