In this article, we report on the analysis of the extended acoustic signature obtained from the pulse-echo method to evaluate the B/A nonlinear parameter in fluids. In the known form of the method, the first acoustic tone burst from the reflector is used for the parameter measurement. The multiple pulse-echo method (MPEM) makes use of several tone bursts coming from the reflector back wall. The distortion ratio can be increased when the source frequency is tuned to a reflector resonance. The repercussion of this increase in the measurement of the nonlinear parameter B/A is investigated. As a practical result, this work suggests that the fluid volume required for the measurement can be reduced.

中文翻译：

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使用多重脉冲回波方法（MPEM）增强声失真比，以评估B / A非线性参数。

在本文中，我们报告了从脉冲回波方法获得的扩展声学特征分析，以评估流体中的B / A非线性参数。在该方法的已知形式中，将来自反射器的第一声调猝发用于参数测量。多脉冲回波方法（MPEM）利用了来自反射器后壁的多个音色脉冲。当源频率调谐到反射器共振时，失真率会增加。研究了这种增加对非线性参数B / A测量的影响。作为实际结果，这项工作表明可以减少测量所需的流体量。