动物声通信的非线性频率—重量标度特性

Nonlinear pressure depended frequency-body mass scaling rule for animal communication

自然选择使不同的动物使用不同的声音频率进行交流,动物根据自身的条件和最佳的声音传播距离选择最优发声频率.本文考虑发声频率f和声门下压P之间的非线性关系,采用被动生物声呐理论和离体喉实验,对预测动物发声频率标度特性进行优化.分别对声门下压为10cm H_2O到31cm H_2O之间的发声频率进行线性拟合,声门下压为10cm H_2O到49cm H_2O之间的发声频率进行非线性拟合(拟合优度分别为R2=0.98、R2=0.99).结果显示,考虑声门下压和发声频率之间的非线性关系,得到动物发声最优频率和体重的0.67次幂呈反比.

Natural selection and evolution make different animals employ widely different frequencies for their sound communication,animals choose the optimal frequency according to their own conditions and the best sound propagation distance.This study considering the nonlinear relationship between the frequency and subglottal pressure,adopting excised larynx experimental and passive biosonar theory,optimizes the phonation frequency scaling rule.Both the linear fitting method and nonlinear fitting method,respectively,are used to fit the fundamental frequency f under subglottal pressure P from 10 cm H 2 O to 31 cm H 2 O(R 2 =0.98),and from 10 cm H 2 O to 49 cm H 2 O(R 2 =0.99).The optimal frequency is inversely proportional to 0.67 power of the animal’s body mass.