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

结合从肺到声道的势流有限元系统，建立了分析超弹性有限变形Doby固有频率和动力响应的三维有限元系统。研制了一套解决声带自激振动的系统。并应用于求解声带自激振动的各种频率，这些频率随声带内部肌肉的激活而变化。通过与22岁活人的声带振动和FFT的测量结果的比较，表明上述方法的模拟结果可以令人满意地应用于解决这一领域的问题。通过解析求解通过舌部收缩分离到硬腭的多个连接的口腔的声学共振方程，得到各自的五个元音的共振峰频率。T…给出了用正交样条函数表示声道三维形态的一般方法。结合上述方法，基于暂态声场有限元方法，采用多步最小二乘法识别了各元音的声道共振形状。用上述方法得到的元音频率谱与22岁正常人的频率谱进行了比较，获得了令人满意的一致性。其次，利用人工发音装置进行了一系列的人工辅音发声测试。从这些结果可以看出，每个辅音的发音频率都很高。最初产生于收缩带。尽管从辅音声头到后发元音的过渡过程不同，而且不同的后发元音类型，但其发声频率几乎是相同的。最后，为了考察发声的特点，用K-epsilon模型对口腔收缩带附近的浊流进行了分析，并将所得结果与上述最小二乘法的结果进行了比较，得到了较好的相关性。较少

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