Definition of "hydrophones" [hydrophones]

• Plural form of hydrophone. (noun)

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• "The farthest I've put one in the water is 90 meters down, near Greenland, but I'm looking into the possibility of getting hydrophones to put on the bottom of the ocean with a wireless connection."
• "Boats have spent months cruising the river with binoculars and sonar equipment, and others have used hydrophones to pick up on the dolphin's calls, without success."
• "Navy set up an array of underwater microphones, or hydrophones, around the globe to track Soviet submarines."