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sonar definition - telecom
A sonic device used for the detection and location of underwater objects. Active sonar emits sound waves and measures the characteristics of the waves reflected from objects. Passive sonar simply measures the characteristics of sound waves emitted by objects. Sonar determines the range and position of such objects through the use of the Doppler effect, radial component of velocity measurement, and triangulation. See also ping and radar.

Webster's New World Telecom Dictionary Copyright © 2008 by Wiley Publishing, Inc., Indianapolis, Indiana.
Used by arrangement with John Wiley & Sons, Inc.

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