高中物理第一册(必修)“声波的干涉”中写道:人“围绕正在发声的音叉走一圈,就会听到声音忽强忽弱。”实验难以奏效。甲种本中还写道:“人不动,而使音叉绕叉柄的纵轴旋转,就会听到声音忽强忽弱,”演示结果也不明显。有的文章介绍用话筒接收,示波器显示。由于因音叉发声时间不长效果也不佳。 为此,我对这一实验作如下改进: High School Physics Book 1 (required) “Sonic Interference” writes: People “walk around the sounding fork and hear sounds flickering.” The experiment is hard to work. A species of this book also wrote: “People do not move, and the tuning fork rotates around the longitudinal axis of the fork handle, you will hear the sound of flickering,” the demonstration results are not obvious. Some articles describe reception using a microphone and an oscilloscope display. Because the sound of the tuning fork does not last long, the effect is not good either. For this reason, I made the following improvements to this experiment: