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Experimental Study on Artificial Vocalization by Using Artificial Vocal Chord-Vocal Tract System. and Theoretical Approaches on Vocalization Mechanica of Vocal Chord-Vocal Tract System

利用人工声带-声道系统进行人工发声的实验研究。

基本信息

批准号：
05805023
负责人：
TSUTA Toshio
金额：
$ 1.34万
依托单位：
HIROSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

项目摘要

Three-dimensional finite element system for analysing eigen-frequency and dynamic response of hyperelastic finite-deformation doby have been developed.Combined with the finite element system of the potential-flow for beathing flow from lung to vocal-tract. a total system to solve the self-exciling vibration of vocal chord has been developed. and applied to solve a wide varieties of frequencies in the self-exciting vibration of vocal-chord, which vary with the activation of interior muscles of the vocal-chord.It is demonstrated, through comparisons with mesurement results of the vocal-chord vibrations and the FFT in voice of living human of 22 years olds, that the simulation result, obtained by the above method, can be satisfactorily applied to solve this fields of problems.The acoustically resonant equations of plurally connected mouth-cavities, which is separated by tongue-contraction to hard palate are analytically solved for obtaining Formant-frequencies of respective five-vowels. T … More hen the general method to express the three dimensional configuration of the vocal-tract by using orthogronal spline functions has been developed. Combined with above methods, resonant shapes of the vocal-tract for respective vowels have been identified by using multi-steps of least spuare-approaches, based on the finite element method for transient acoustical-fields. The frequency spectors for respective vowels, obtained by above approaches, are compared with those of actual human of 22 years olds, and satisfactorily good concordances between them are obtained.In the next place, a series of artificial consonant vocalizing tests has been carried out in the same way by using artificial pronounciation devices.It is found from these results that each consonant spector. initially generated in the contraction zone. has nearly common frequeucy spector, despite of different transition process from consonant head-part to suceeding vowel, and despite of the type of succeding vowel.Finally, the turblent flow analysis near contracting zone in mouth cavity, has been carried out by using K-epsilon model, in order to review the characteristics of the vocalization, and the obtained results are compared with those of above least square approach, yielding to comparatively good correlations. Less

本文建立了分析超弹性有限变形杜比固有频率和动态响应的三维有限元系统，并与肺-声道脉动流势流有限元系统相结合。研制了一套解决声带自激振动的完整系统。并应用于求解声带自激振动中随声带内部肌肉活动而变化的各种频率，通过与声带振动测量结果和22奥尔兹活体嗓音FFT结果的比较，证明用上述方法得到的仿真结果，用解析法求解了由舌向硬腭收缩而分离的多个连通口腔的声学共振方程，得到了各五个元音的共振峰频率。不 ...更多信息提出了用正交样条函数表示声道三维结构的一般方法。结合上述方法，基于瞬态声场的有限元法，采用多步最小二乘法识别了各元音声道的共振形状。用上述方法得到的各元音的频谱与22奥尔兹正常人的频谱进行了比较，取得了令人满意的一致性。其次，用同样的方法用人工发音装置进行了一系列的人工辅音发声试验。从这些结果中可以看出，各辅音频谱都是由不同的元音组成的。最初产生于收缩区。最后，本文用K-S模型对口腔收缩区附近的湍流进行了分析，以考察其发声特点，并与上述最小二乘法的结果进行了比较，产生相对良好的相关性。少