Term	Definition	Demo
Comb Filter	AUDIO: A characteristic of a frequency response curve that appears when a sound is combined with a delayed version of itself. The name comes from the orderly, repeated, bump-dip-bump-dip visual appearance, looking like a comb. Comb filtering that occurs in a simple signal path can be annoying. However, rooms are very complicated comb filters, due to the many reflected sounds, and common experience tells us that this is usually perceived as a benefit e.g. concert halls. VIDEO: a filter that separates a composite video signal into luminance (black and white) and chrominance (color) components. See: Luminance, Chrominance, Frequency Response, Acoustical Interference.