一种声、波同步显示的“拍”现象演示仪

A DENONSTRATOR FOR "BEAT" PHENOMENON OF SOUND AND WAVE SYNCHRODISPLAY

本装置通过扬声器可分别发出两个单频音和合成后的拍音，同时利用激光将波形投影在墙上；可见（闻）度极高，还可单独利用激光演示光的干涉、衍射、偏振等现象。

This device can send two-single-freauency sound and synchrobeat respectively through loudspeaker,and meanwhile the shape of wave is projected onto the wall by use of laser,so that they can be both seen and heard.Other phenomena like interference,inflection, POlarization can also be displayed by means of laser.