驻波法之声压极小值测声速研究  

Measuring sound velocity on basis of sound pressure minimum in stationary wave field

作　　者：田玉仙[1] 李绍蓉 陈丹[1] 龚安[1] 杨易[1] 

机构地区：[1]西安科技大学理学院,陕西西安710054

出　　处：《物理实验》2014年第8期38-41,45,共5页Physics Experimentation

基　　金：陕西省教育厅科研计划资助项目(No.2010JK673)

摘　　要：传统的驻波干涉法采用声压极大值测声速,受示波器屏幕尺寸限制,灵敏度差.详细分析了驻波共振干涉法测声速的原理,确定了声压极小值测声速的理论依据.用声压极小值法测定了声速,实验结果表明:该方法比声压极大值法更好操作且误差更小.Traditional stationary wave interferometry was a kind of maximum sound pressure method which was used to measure sound velocity.Restricted by the screen size of the oscilloscope,the sensitivity was poor.The stationary wave resonant interference method was analyzed in detail in this paper.The theoretical basis of minimum sound pressure method was found out.Experimental results indicated that this method was better than the maximum sound pressure method,and the error was smaller.

关 键 词：声速 驻波 共振干涉法 声压 

分 类 号：O422.1[理学—声学]