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Related to cardioid microphone: Ribbon microphone, omnidirectional microphone, unidirectional microphone
cardioid microphone[′kärd·ē‚ȯid ′mī·krə‚fōn]
A microphone having a heart-shaped, or cardioid, response pattern, so it has nearly uniform response for a range of about 180° in one direction and minimum response in the opposite direction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.