hydrophone Definition

omnidirectional, geophone, sonar, seismometer, transducer, transmitter, seismograph, sensor, dipole antenna, echolocation, directional antenna, seabed, echo sounder, sonde, dropsonde, telemeter, gyrocompass, fluorometer, spectrographic, resonant cavity, spectrograms, birdcall, bioacoustics, electroencephalograph, submersible, minisub, toadfish, seafloor, retroreflector, oceanographic, gradiometer, klystron, inclinometer, radiosonde, sounders, airglow, buoys, inertial navigation system, bathysphere, bathyscaph, narwhals, voltmeter, humpback whale, gulper, bathyscaphe, microelectrode, radiometer, anechoic chamber, goniometer, lanternfish, reflectometer, remus, altimeters, manometer, snailfish, sonification, dolphins, vocalizations, radiotelephone, stroboscope, microswitch, cardiograph, strain gage, marum, lazarette, archerfish, resonators, lavalier, condenser microphone, inferior colliculus, brachiopods, geomagnetism, electrodes, finback, whale, subantarctic, electromagnet, otoliths, lavaliere, eegs, spectroscopic analysis, birdsongs, porpoises, spectroscope, microphones, bathymetry, bilge pump, strain gauge, mossbauer, homing device, davit, paramecia, dipole, elint, bolometer, annunciator, pulser, sextants, cetacean, otolith,