一种新的声吸收系数测试法

A New Method For Measurement of Acoustic Absorption

本文基于脉冲超声技术和MPU技术,提出了一种新的声吸收系数测试方法——“面积比值法”,并以三种不同的悬浮液为介质,在不同的重量浓度下测量了相应的吸收系数,所得结论与Urick的理论和实验相符,

In this paper a new method, based on ultrasonic pulse techanique and microprocesor, for the measurement of acoustic absorption is introduced. And the absorption coefficient of different suspensions with different concentration can be measured by this method. The measuring results of three different examaples agree with the theory and test of Urick.