一种二质量块声带模型的声带麻痹特征参数分析方法

A Method of Vocal Cord Paralysis Characteristic Parameter Analysis Based on Two-Mass Model

本文提出了一种二质量块声带模型的声带麻痹特征参数分析方法。建立二质量块声带模型来提取声带麻痹的相关特征参数,分析声带麻痹不对称系数和声门下压对声带振动和声门气流体速度的影响,研究不对称系数和声门下压与基频之间的相关性,得到其定量表达式。实验结果表明,当Ps由0.02 atm增加到0.05 atm时,β=1.0与β=0.7的基频差值变化量为22.340 Hz;当β由0.9减小到0.7时,Ps=0.02 atm与Ps=0.05 atm的基频差值变化量为7.288 Hz。声带麻痹时F0与β和Ps呈正相关,F0对β的敏感程度大于Ps。

This paper presents a method for analyzing the characteristic parameters of vocal cord paralysis in a two-mass vocal cord model. A two-mass vocal cord model was established to extract the relevant characteristic parameters of vocal cord paralysis. The effects of asymmetric coefficients of vocal cord paralysis and subglottic pressure on vocal cord vibration and glottic airflow velocity were analyzed. The correlation between asymmetric coefficients and subglottic pressure and fundamental frequency was studied and its quantitative expression was obtained. The experimental results show that when Ps increases from 0.02 atm to 0.05 atm,the fundamental frequency difference between β=1.0 and β=0.7 changes to 22.340 Hz;when β decreases from 0.9 to 0.7,the fundamental frequency difference between Ps=0.02 atm and Ps=0.05 atm changes to 7.288 Hz;when vocal cord paralysis occurs,F0 is positively correlated with β and F0,and F0 is more sensitive to β than Ps.