声音驻波实验是高校大学物理实验必修内容之一，但其传统实验仪器存在不足。深入分析声驻波产生机理和特性，自主设计声光转换电路，该电路可以把声驻波信号有效精准地转化为二极管发光信号，并将其应用在驻波管内，成功研制出一种声控发光驻波实验仪器。该仪器不仅实现了驻波现象定性演示和定量测量的有机结合，具有操作简便、直观性强、运行稳定、测量精度高的优点，而且对高校同类实验教学仪器研制具有重要的借鉴意义。

The sound standing wave experiment is a compulsory part of university physics experiments, but its traditional experimental apparatus is inadequate. The article provides an in -depth analysis of the mechanism and characteristics of sound standing wave generation. We have designed an acoustic-optical conversion circuit, which can effectively and precisely convert the sound standing wave signal into a diode luminescence signal and apply it in a standing wave tube, and we have successfully developed a sound-controlled light-emitting standing wave experimental apparatus. The apparatus not only realizes the organic combination of qualitative demonstration and quantitative measurement of the standing wave phenomenon, but also has the advantages of easy operation, visual clarity, stable operation, and high measurement accuracy. It can also provide important reference for the development of similar experimental teaching apparatus in universities.