Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《College Physics》 2002-12
Add to Favorite Get Latest Update

Analysis of three questions in the experiment of measuring sound velocity

JIANG Xingfang(Department of Information Science, Jiangsu Institute of Petrochemical Technology, Changzhou, Jiangsu, 213016, China)  
The questions of halfwaveloss in the experiment of measuring of sound velocity: the curve of the amplitude, the sound pressure wave and the phase of the sound pressure wave are described differently in college physics experiments. Analysing the properties of mechanical wave, it is pointed out that the difference between the phase of the displacement wave and pressure wave is π2. This explains the seemingly selfcontradiction halfwaveloss in spreading of sound and no halfwaveloss in the result of the experiment. The curve of the amplitude of the sound pressure wave and the attenuation law of the curve are given. It shows a phase comparison method with doubletrace (or fourtrace) oscillograph is suggested.
【CateGory Index】: O422
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved