一种使纵波产生驻波演示装置的实现

本装置可以通过声波的反射、叠加产生纵波的驻波，并利用煤油的振动演示声驻波现象，帮助观察者形象的理解声音的转播，而且还可以比较精确的测量出声音在某种气体中的传播速度。更重要的是本装置还可以测量声波在气体不同湿度、温度、密度下的空气中的传播速度，并通过更换玻璃管中的气体和液体来产生和分析多种驻波现象。

A Presentation Device of Standing Wave Generated by Longitudinal Wave

This device can produce the standing waves of longitudinal wave with the reflection and superposition of sound wave ; u- ses the kerosene vibration to demonstrate the acoustic standing wave phenomenon and help the viewer to visually understand the sound rebroadcasting, also it can more precisely make a measurement for the propagation speed of sound in a gas. More importantly, the de- vice can measure the propagation velocity of acoustic waves at the conditions of different gas air humidity, temperature, density, and to generate and analyze the multiple standing wave phenomena by replacing the gas and liquid in the glass tube.