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在中师(中学)物理教材中《声音的共呜》一节中用图1的实验装置简单地介绍了空气柱跟声波发生共呜的现象:敲击音叉后,将玻璃管慢慢向上提,当管口离水面到一定高度时, 能听到较强的声音,这就是管内的空气和音叉的声波发生了共呜。这时露出水面的玻璃管的长度就是第一次发生共呜时空气柱的长度。如果玻璃管足够长,继续向上提
In the section “Commonly Talking about Sound” in the physics textbook for secondary school (secondary), the experimental apparatus of Figure 1 was used to briefly describe the phenomena of air column and sound wave commingling: After striking the tuning fork, slowly lift the glass tube upwards. When the nozzle is away from the water to a certain height, it can hear a strong sound. This is the sound of the air inside the tube and the sound of the tuning fork. At this time, the length of the glass tube exposed to the surface of the water is the length of the air column at the time of the first occurrence of communal depression. If the glass tube is long enough, continue lifting