PARAMETRIC EFFECT AND NONLINEARITY PARAMETER IN BIOLOGICAL FLUIDS

作     者：Gong, Xiufen Zhu, Zheming Fan, Bin GONG Xiufen , ZHU Zheming and FAN Bin(Institute of Acoustics , Nanjing University )

作者机构：Nanjing Univ China 

出 版 物：《Chinese Journal of Acoustics》 (声学学报（英文版）)

年 卷 期：1989年第8卷第4期

页      面：341-346页

核心收录：

学科分类：07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学] 

基　　金：The project supported by National Natural Science Foundation of China 

主　　题：Biological Materials 

摘      要：Based on the Fenlon s theory the parametric effects in fluids due to the nonlinear interaction of a low frequency pumping wave and a high frequency probing wave are analysed. The expressions of pressure amplitude of sum or difference frequency sideband and the formula of nonlinearity parameter B/A for lossy medium are derived. Theoretical calculation demonstrated, that the sideband components increase linearly with pump signal. Therefore, a method for determination of B/A is provided and the values for several biological fluids and mixtures are measured.