干涉在音叉中的应用

Application of interference in tuning fork

在音叉的振动中,对叉股产生波的个数都没有深入研究。因此,很多教材都认为两个叉股产生两列声波,音叉振动是两列声波干涉的结果。针对上述存在的问题,阐明了在音叉振动时每个叉股都产生两列位相相反的波,则音叉的两个叉股就产生四列声波,利用干涉机理说明音叉的振动就是四列声波干涉的结果,从而可用声强传播的方向性和声波的干涉理论来解释绕音叉叉柄纵轴旋转一周就可以听到四强四弱的声音。本文对研究音叉振动问题有一定的指导作用。

When tuning forks shake, the numbers of forks that produce waves have not been studied. Therefore, many books consider both forks of tuning produce two waves.The shakes of the tuning forks are the result of the interference of two sound waves. Aiming at the above-mentioned problems.the article puts forwards that when the tuning forks shake, if the shake of them is considered as the waves of both forks from rightabout directions, both forks of tuning will produce four waves. According to the theory of the interference, the shakes of the tuning forks are the result of the interference of four sound waves. Therefore, the theories of the directions of sound intensity transmission and the interference of sound waves can explain why people can hear four strong and four weak sounds when circuitous toning forks circumrotate. This paper has certain guiding significance for study of the tuning forks shake problem.