浅谈杯鼓实验中空气柱的选频作用  

Discussion on Frequency Selection of Air Column from the Experiment of Cup Drum

作　　者：潘月婷[1] 吴明和[1] 周荣朴[1] 滕保华[1] 

机构地区：[1]成都电子科技大学,四川成都610054

出　　处：《大学物理实验》2012年第3期27-29,共3页Physical Experiment of College

基　　金：成都电子科大教研课题(2011WJY07)

摘　　要：本文首先通过杯鼓实验得到了不同空气柱长度下杯内声波的频域图,然后基于波动理论解析分析了边界振动有衰减时空气柱的共振频率及振幅,结果表明空气柱长度在声波传播过程中具有明显的选频作用。In the cup drum experiment, we get the frequency-domain graphs of the produced sound waves which are correlated to different length of the air column. Meanwhile the one-dimensional ana- lytical solution is given. The results show that the length of the air column has a significant effect on the frequency selection of sound waves.

关 键 词：杯鼓 声波 空气柱 选频 

分 类 号：O411[理学—理论物理]