This paper presents a study of the reflection of sound pulse from porous material in the ease that the impulse sound source and receiver are located on a line perpendicular to the surface of material.
本文提出当脉冲声源和接收点在同一条垂直于材料表面的直线上时，声脉冲从多孔材料反射的研究。
Including the principles and the source design, a method of digitally-controlled sound impulse generator is introduced.
研究了一种可控脉冲声生成技术，介绍了声源设计方案以及脉冲声工作生成的主要原理。
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