固体中时间反转法的声束自聚焦

Self-focusing of acoustical beam in solid by time-reversal processing

时间反转是一种很有用的自适应聚焦技术。本文中我们进行了声束在固体中运用时间反转方法的自适应聚焦研究。理论分析和实验结果表明时间反转可补偿固体中各声线的程差，从而同时实现纵波和横波的自聚焦。聚焦增益的理论值和实验结果较好地符合。

We present a study on the selfadaptive focusing of acoustical beam in the solid by time-reversal (TR)method. The theoretical analyses and experiments show that TR can compensate the path difference of sound pulse insolid, and generate the selffocusing of longitudinal and shear wavs at the same time. The experimental values of thefocusing processing gain are agree with the theoretical values.