Soundproofing glossary definition of discrete tone

discrete tone :

A discrete tone can be either a sinusoidal variation (see 4.05, pure tone), in which case the frequency spectrum would show a single "spike" at the sinusoidal frequency, or, more typically, a non-sinusoidal variation, in which case the spectrum would show a spike at the fundamental frequency and other spikes at harmonics of the fundamental.

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