The tuning fork is a metal fork shaped like the English word line U. The lower end has a handle, and the upper end is hammered, that is, a sound of a certain frequency is emitted. The tuning fork is long and thin, and the frequency of pronunciation is low; the arms are short and thick, and the frequency of pronunciation is relatively high. Because it contains very few harmonic components, the sound is close to the pure tone, so it is often used as a standard for the determination of tones, and it can also be used as a sound interference experiment to generate standing waves.
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