大学物理实验
大學物理實驗
대학물리실험
PHYSICAL EXPERIMENT OF COLLEGE
2012年
2期
75-77
,共3页
最小二乘法%声速测定%声压%衰减系数
最小二乘法%聲速測定%聲壓%衰減繫數
최소이승법%성속측정%성압%쇠감계수
least square method%sound velocity measuring%sound pressure%attenuation coefficient
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。
用振幅極大值法比振幅極小值法測聲速的誤差小和聲波在傳播過程中聲壓按指數函數關繫衰減。
용진폭겁대치법비진폭겁소치법측성속적오차소화성파재전파과정중성압안지수함수관계쇠감。
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.
