The improved experiment device of interference of sound wave can feel the interference countervail and strengthening of sound in ordinary lab, and measure the sound velocity.

• 摘要本文给出了改进声波干涉实验装置的具体方案，该改进装置可在普通实验室内感受声音的干涉相消和干涉加强现象，并能测定声速和频率。