在弯曲界面反射和透射的声束中的二次谐波产生。

Second-harmonic generation in a sound beam reflected and transmitted at a curved interface.

作者信息

Makin I R, Averkiou M A, Hamilton M F

机构信息

Department of Mechanical Engineering, The University of Texas at Austin 78712-1063, USA.

出版信息

J Acoust Soc Am. 2000 Oct;108(4):1505-13. doi: 10.1121/1.1289665.

DOI:10.1121/1.1289665

PMID:11051477

Abstract

This article presents a model for second-harmonic generation in a sound beam that is reflected from or transmitted through a curved interface. Propagation in homogeneous fluids is assumed. Simple analytic solutions are derived for the case of focused Gaussian beams. The solutions are used to illustrate the effects of focusing or defocusing due to curvature of the interface, in combination with impedance change at the interface, on energy transfer from the fundamental to the second harmonic.

摘要

本文提出了一种用于声波束二次谐波产生的模型，该声波束从弯曲界面反射或透射过弯曲界面。假定在均匀流体中传播。针对聚焦高斯光束的情况推导了简单的解析解。这些解用于说明由于界面曲率导致的聚焦或散焦，以及界面处的阻抗变化，对从基波到二次谐波的能量转移的影响。