1种通过声带空气动力学模型求解发声阈值压力的方法

A Method for Solving the Phonation Threshold Pressure with the Aerodynamic Model of Vocal Cords

提出了1种通过声带空气动力学模型求解发声阈值压力的方法,对Titze提出的发声阈值压力表达式进行了修正.从嗓音发声原理角度,利用声带的空气动力学模型数值求解声门内的流场变化,得到声门入口损失系数和声门直径的关系,从而对发声阈值压力表达式进行修正.将修正后的阈值压力表达式与Chan等的实验结果比较,验证修正后阈值压力表达式的准确性.结果表明:本文提出的求解方法可以较准确地预测发声阈值压力随声门直径变化的趋势,克服了之前的发声阈值压力表达式的局限性.

A method for solving the phonation threshold pressure by using the vocal cords aerodynamic model was proposed to modify the expression of the threshold pressure given by Titze.From the perspective of vocal cord production principle,the aerodynamic model of vocal cord was used to solve the variation of flow field in the glottis,and then the relationship between glottal inlet loss coefficient and glottal diameter was obtained.Therefore,the expression of vocalization threshold pressure was modified.The accuracy of the modified threshold pressure expression was verified by comparing the modified threshold pressure expression with the experimental results obtained by Chan et al.The results show that the solution method proposed in this paper can accurately predict the variation trend of threshold pressure with glottal diameter and overcome the limitation of the previous threshold pressure expression.