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你听过电子风琴演奏的悦耳曲调吗?一个人在那里演奏,我们听起来却恍如一支乐队在演出一样。为什么一架电子风琴能有这样大的本领呢?它是根据什么道理制成的呢?要了解这些,就要懂得一些频谱分析的知识。复杂振动的分解不论是声振动、机械振动还是电振动,我们最关心的是它的振幅和频率。最简单的振动只有一种频率,也就是每秒钟振动次数是恒定的。复杂的振动则可能包含许多频率,每种频率振动的振幅也不尽相同。我们乘坐公共汽车在凸凹不平的道路上行进时所感受到的振动就是复杂的振动。人的声带振动发出歌声
Have you heard the melody of the organ playing? Where one plays, we sound like a band performing. Why an electronic organ can have such a big ability? It is based on what reason it made? To understand this, we must understand some knowledge of spectrum analysis. Complex Vibration Decomposition Whether it is acoustic vibration, mechanical vibration or electrical vibration, our greatest concern is its amplitude and frequency. The simplest vibration has only one frequency, that is, the number of vibrations per second is constant. Complex vibrations may contain many frequencies, and the amplitude of vibration varies for each frequency. The vibrations we experience when traveling on bumpy roads by bus are complex vibrations. People’s vocal cords vibrate