摘要
用振幅极大值法比振幅极小值法测声速的误差小和声波在传播过程中声压按指数函数关系衰减。
Using the computer least square method process the experimental data of the sound velocity measuring.The results show that the error of measuring the speed of sound by the maximum amplitude method is small than by the minimum amplitude method in measuring sound velocity by resonance interference method and the sound pressure of the sound waves in the communication process attenuates by exponential function.
出处
《大学物理实验》
2012年第2期75-77,共3页
Physical Experiment of College
基金
韩山师范学院青年科学基金项目(LQ200908)
关键词
最小二乘法
声速测定
声压
衰减系数
least square method
sound velocity measuring
sound pressure
attenuation coefficient
