The frequency response caused by combining a sound with its delayed duplicate. The frequency response displays a series of peaks and dips caused by phase interference. The peaks and dips look like the teeth of a comb, with very narrow, deep notches where signals are attenuated.
COMB-FILTER EFFECT
Meaning of COMB-FILTER EFFECT in English
Guitar English glossary. Английский словарь гитарных терминов . 2012