驻波法测超声波衰减系数

摘要

用驻波法测量超声波在空气中衰减系数的实验方法。与前人的方法进行比较。新的测量结果更符合实际。只有当换能器反射系数r〈0.619时,用简单波拟合得到的衰减系数才比较可信。同时讨论了该方法的实用意义。%The method for the measurement of the attenuation coefficient is studied.Compared with the previous method,the method in this article is more compatible with the experiment.When the reflection coefficient r0.619,the attenuation coefficient fitted with the simple wave is believable.Discuss the value of this method.