声带双弹簧对称振动模型研究

Research on a two-spring symmetrical model of the vocal cord vibration

依据人体声带生理结构特点和振动情况,运用声学基本理论,采用电力声类比方法,建立了声带振动模型和声道模型.运用双弹簧对称振动模型模拟声带振动,应用数值计算方法定量研究了声带振动的物理机理,并对声门阻抗和双弹簧振动系统的动力学进行了分析.结果表明:选取适当的声门和声道参数,可以确定双弹簧对称振动模型中质量块和弹簧的参数.通过模拟声带振动及声门波,得到了其数学表达式,给出了声阻抗的等效电路和语音信号系统的电路模型图.

According to the physical structure and vibration characteristics of the vocal cords,the model of vocal channel and vocal cords vibration are established by using the acoustics theory and electricity power-sound analogy.The vocal cords vibration is simulated with a double-spring symmetrical vibration model and its physical mechanism is studied quantitavily by numerical method.Based on the hierarchical theory of the vocal cords,the glottis impedance and the double-spring vibration system are analyzed.The results show that with selecting the appropriate parameters of the channel and glottis,the mass and the parameters of the double-spring symmetrical vibration model can be determined.Finally,the mathematical expression is given and the models of equivalent acoustic impedance circuit and voice signal system circuit are drawn.