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物体振动的时候,空气受到激蕩,在空气中形成了一种波浪。这种波浪傳到我們的耳朵中,我們就听到了声音。声音有高低和强弱的分別。声音的高低(音調)由發音物体的振动頻率(單位时間內振动的次数)来决定,頻率愈高,音調就愈高。在音乐歌唱,高音就是頻率高的声音,低音就是頻率低的声音。平常在我們的周圍总有着包含很多种頻率的声音,但是我們听来不很显著。声音的强弱和声波的振幅的大小有关。振幅愈
When the object vibrates, the air is stirred and a wave forms in the air. This wave reached our ears and we heard the sound. There are differences in the level of sound and strength. The level of the sound (tone) is determined by the frequency of vibration of the sounding object (the number of vibrations per unit of time). The higher the frequency, the higher the pitch. In music singing, treble is a high-frequency sound, and bass is a low-frequency sound. There is always a wide variety of frequencies in our surroundings, but we do not hear much. The strength of the sound is related to the amplitude of the amplitude of the sound wave. More amplitude