声带振动与声门图多质量运动学模型研究

MULTI-MASS KINEMATICAL MODEL FOR VOCAL FOLD VIBRATION AND GLOTTOGRAMS

本文在声带振动运动学水平上建立了声带边缘位移函数,函数综合考虑了发声位两侧声带夹角、声带厚度边缘倾角及边缘曲面形状和发声振动过程中振幅和相位在声带边缘上沿长度和厚度两方向的分布,以及两侧声带接触碰撞非线性过程等因素的影响。以位移函数为基础,并将声带沿厚度和长度方向分解为8×8个振动质量,通过仿真计算,在各种参数组合条件下得到的声门图波形与相应的实测波形是相似的,与声带振动的生理与病理解释结果是一致的。本文从又一个侧面证实了声门图与声带振动的关系。

According to the kinematics of vocal fold vibration, the displacement func- tion of vocal fold edge during phonation is set up. The function includes the influences of many factors. such as the angle θ between left and right vocal fold edges. the dip θ_ z of thick surface. curvature shape of thick surface, vibra- tion amplitude and phase distributions along length and thickness, and nonlinear process of contact and collision for Vocal folds, etc. On the basis of displace- ment function, after vocal fold is decomposed into 8×8 vibration masses along length and thickness, glottographic waveforms for different parameter sets are obtained by simulation computing. Simulated and corresponding measured wave- forms are not only similar, but also identical to physiology and pathology of vocal fold vibration. The results verified the relations between glottograms and vocal fold vibration in a new aspect.