在中学物理教科书中,对于声现象的认识手段主要还是用耳朵去听。不过,借助音响器材和多媒体技术,通过对声音的频谱分析,可以对声音进行更深入的观察和认识。频谱图是代表瞬间声音中各个频率成分分布的图形,图形的横轴表示频率值,纵轴是横轴频率点所对应的声音音量大小。频谱图既代表声音的频率构 In high school physics textbooks, the means of knowing about the sound phenomena are mostly still heard with their ears. However, with the help of audio equipment and multimedia technology, the sound can be further observed and recognized through spectrum analysis of the sound. The spectrogram is a graph representing the distribution of the individual frequency components in an instantaneous sound. The horizontal axis of the graph represents the frequency value and the vertical axis represents the volume of the sound corresponding to the horizontal axis frequency point. The spectrogram represents both the frequency structure of the sound