论文部分内容阅读
发声的音叉周围存在互相间隔的四个声强区和四个声弱区,如图1所示。本文从波的叠加原理出发,同时考虑到声波的相位差别、强度分布和声波波长λ远大于音叉横截面尺寸d的具体情况,用两种方法定性解释这个现象。插图中的实线圆弧和虚线圆弧分别代表密部和疏部或反相的波面,而各处声音强弱则以文字注明。
There are four zones of intensity and four zones of sound and weakness that are spaced apart from each other around the phonation of the tuning fork, as shown in Figure 1. This article starts from the principle of wave superposition, taking into account the phase difference of the acoustic wave, the intensity distribution, and the specific situation where the acoustic wave wavelength λ is much larger than the cross-sectional dimension d of the tuning fork, and qualitatively explains this phenomenon by two methods. The solid and dashed arcs in the illustration represent the dense and sparse or antiphase wavefronts, respectively, and the strengths and weaknesses of each location are indicated in the text.