[ hahy-druh-fohn ]
/ ˈhaɪ drəˌfoʊn /


a device for locating sources of sound under water, as for detecting submarines by the noise of their engines.
an instrument employing the principles of the microphone, used to detect the flow of water through a pipe.
Medicine/Medical. an instrument used in auscultation, whereby sounds are intensified through a column of water.

Origin of hydrophone

First recorded in 1855–60; hydro-1 + -phone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hydrophone

British Dictionary definitions for hydrophone

/ (ˈhaɪdrəˌfəʊn) /


an electroacoustic transducer that converts sound or ultrasonic waves travelling through water into electrical oscillations
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for hydrophone

[ hīdrə-fōn′ ]

A device used to detect or monitor sound under water. Hydrophones are often installed or towed in arrays that can be used to pinpoint a sound source or provide sea-floor imaging as part of a sonar system.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.