当第二个音叉被调谐到与第一个音叉调谐音或波形能发生谐波共振的时候这些才会出现。
This occurs only when the second fork is tuned to a resonant harmonic of the first tuning fork's note or waveform.
所有能产生音级的乐器都有谐音，因此对某见乐器而言，谐波失真在某种程度上只是稍稍改变了一下它的音质。
All Musical Instruments create tones having harmonics, so a device whose distortion adds a little more merely changes the instrument's character by some amount.
调谐音或波形能发生谐波共振的时候这些才会出现。
The nature of the wave motion in sound can be made clear by considering the tuning fork.
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