共振声谱法测量液体声速实验

Measurement of liquid acoustic velocity using acoustic resonance spectroscopy method

液体声速是液体声学的重要参数之一 ,获得液体声速常用的方法是脉冲反射法 ,文章提出一种新的测量方法 ,即共振声谱法。根据共振声谱学原理 ,利用所建立的共振声谱测量系统 ,测量得到液体 (变压器油 )的声速和声阻抗 ;并与脉冲反射法所得到的测量结果进行分析对比 ,两种方法的测量结果基本吻合。实验结果表明 :共振声谱法可以用于液体的声速测量。

Velocity is one of the important acustic parameters of liquid. Ultrasonic-pulse reflection method is a suited technique of measring the acoustic velocity of liquid. In this paper, a new method is put forward, namely acoustic resonance spectroscopy (ARS). Based on the theory of ARS, the acoustic velocity and acoustic impedance of transformer oil are measured using the established measuring system of ARS, and the results are compared with that gained from ultrasonic-pulse reflection method. The results are in agreement with each other approximately, which shows that the method of ARS can be used to measure the acoustic velocity of liquid.