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本文介绍了一种在实验室条件下利用声脉冲测定有限容量液态介质样品声衰减系数的测试方法．该方法根据声纳方程原理导出了与测试系统参数和声场参数无关的计算式，从而避开了对测试系统参数和声场参数的测量．采用截取未被边界散射干扰的直达声脉冲的部分信号进行频谱分析，消除了在有限样品情况下必然存在的边界散射干扰．同时采用多次统计平均的做法抑制了噪声干扰．
This paper presents a test method for determining the sound attenuation coefficient of a sample of a liquid of limited capacity using acoustic impulses under laboratory conditions. According to the sonar equation principle, this method derives the formula that has nothing to do with the parameters of the test system and the parameters of the sound field, so as to avoid measuring the parameters of the test system and the parameters of the sound field. Spectral analysis using a portion of the direct sound pulse that intercepts no boundary scatter eliminates the need for boundary scatter interference in the presence of limited samples. At the same time the use of statistical averages many times to suppress the noise interference.