声带双弹簧对称振动模型研究-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

物理学

声带双弹簧对称振动模型研究

康晓莉，曹辉*

(陕西师范大学应用声学研究所，陕西省超声重点实验室，陕西西安 710062)

康晓莉,女，硕士研究生，研究方向为语音声学;E-mail：kangxl@stu.snnu.edu.cn.* 通信作者：曹辉,男,副教授,博士.E-mail:caohui@snnu.edu.cn.

摘要:

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.

关键词：

声带；振动模型；振动位移

收稿日期：

2011-05-30

中图分类号：

O426.1

文献标识码：

文章编号：

1672-4291(2011)06-0031-05

基金项目：

国家自然科学基金资助项目（11074159）.

Doi:

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

KANG Xiao-li, CAO Hui*

(Applied Acoustic Institute, Shannxi Key Laboratoryof Ultraphonics, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)

Abstract:

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.

KeyWords:

vocal colds; model of vibration; vibration displacement