摘要
本文研究了超声声速测定实验中声波振幅的衰减规律．实验结果表明声源发出的是球面波．同时。
As reported in this paper,the attenuation law of sound wave amplitude is studied in the experiment for measuring sound velocity.The experimental result shows that the sound source sends out spherical sound wave.Besides,several methods,in which the wave length is measured by using different functions of a dual trace oscilloscope,are introduced.
关键词
超声声速
驻波
衰减
球面波
测量技术
ultrosonic sound velocity
stationary wave
attenuation
spherical sound wave
