Comb filtering is a destructive phase cancellation pattern occurring when a sound wave mixes with its delayed copy. The resulting frequency spectrum displays regularly spaced series of peaks and deep nulls resembling comb teeth.
Acoustic Physics Formula
In-Depth Acoustic Principle
Comb filtering commonly happens when unabsorbed side-wall reflections reach the mixing position or when two microphones capture the same sound source at different distances.
- Everest, F. A. (2015). Master Handbook of Acoustics
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