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声波干涉实验获得成功的关键:在于有一个能产生相干波又能使之发生干涉的仪器。过去我们曾用音叉作声源来演示,但音叉的音量太小,效果不够理想。为此,我们自己动手制作了一种声波干涉仪,用它做实验,效果很好。一、仪器的结构声波干涉仪的整体结构如图1所示,包括:发声、管道和声探测器三部分。 1.发声部分:声源我们由录放机和扬声器组成。事先将500赫的正弦波录在录音磁带上,打开录放机,扬声器就能发出500赫的纯粹的正弦声波。 2.管道:管道是用塑料输水管,内径约5厘米。其
The key to success in sonic interference experiments is that there is an instrument that can produce coherent waves and interfere with them. In the past, we used the tuning fork as a sound source to demonstrate, but the volume of the tuning fork is too small and the effect is not ideal. For this reason, we made a sonic interferometer ourselves and used it for experiments. First, the structure of the instrument The overall structure of the acoustic wave interferometer shown in Figure 1, including: sound, pipe and sound detectors in three parts. 1. The sound part: The sound source We consist of a recorder and a speaker. A 500-Hz sine wave was recorded in advance on the audio tape. When the recorder was turned on, the speaker emitted a pure sinusoidal sound wave of 500 Hz. 2. Pipeline: The pipe is a plastic water pipe with an inner diameter of about 5 cm. its