摘要
采用低频数字信号源推动小型扬声器做声源,用静电式驻极体传感器做拾音器,对传统的声速测量装置进行了改进.改进后的装置不仅能测量不同频率的声速,而且又降低了成本.本文详细介绍了电路的组成及测量结果.
Using a speaker drived with the output of a low frequency numerical signal generator as sound source and an electret sensor as detector, traditional instrument for sound velocity measurement is improved. This new cost-effective instrument can measure the velocity of sound of different frequency. The design of the circuit and the measuring results are reported in this paper.
出处
《物理实验》
2006年第5期18-21,共4页
Physics Experimentation
关键词
声速测量
声源
驻极体传感器
sound velocity measurement
sound source
electret sensor
