基于MATHEMATICA拟合和仿真的声波衰减研究  

The Study of Acoustic Attenuation Based on MATHEMATICA Fitting and Simulation Function

作　　者：高峰[1] 赵文丽[1] 吕刚[1] 张红[1] 刘海涛[1] 曹学成[1] GAO Feng;ZHAO Wenli;LV Gang;ZHANG Hong;LIU Haitao;CAO Xuecheng(College of Information Science and Engineering,Shandong Agicultural University,Taian 271018,China)

机构地区：[1]山东农业大学信息科学与工程学院

出　　处：《大学物理实验》2019年第4期69-71,共3页Physical Experiment of College

基　　金：中华农业科教基金(NKJ201802010);山东农业大学教学改革研究项目(X2017119)

摘　　要：基于超声波在空气中的传播原理,利用MATHEMATICA软件,拟合出了声压衰减系数和反射系数等参数,并应用动态演示命令Manipulate对声波在发射端和接收端之间的衰减进行动态演示和研究,拟合和仿真能与声速测定实验很好地结合起来加深学生对该实验过程的理解,同时还提供了一种测量空气中衰减系数的方法,具有一定的应用价值。Using the fitting and simulation function of MATHEMATICA and the principle of ultrasonic propagation in air,the attenuation coefficient and reflection coefficient of sound pressure are fitted and the attenuation of sound waves between the transmitting and the receiving ends is dynamically demonstrated.Fitting and simulation not only combine well with the experiment of sound velocity measurement to deepen students’understanding of the experimental process,but also provide a method for measuring the attenuation coefficient in air,which is applicable in practice.

关 键 词：超声波 声压 MATHEMATICA 衰减系数 反射系数 

分 类 号：O4-39[理学—物理]