A hydrophone (Ancient Greek: ὕδωρ + φωνή, lit. 'water + sound') is a microphone designed to be used underwater for recording or listening to underwater...

Atmospheric Administration (NOAA) using its Equatorial Pacific Ocean autonomous hydrophone array. Upsweep Upsweep, from the NOAA website at 20x the original speed...

terminating at NAVFAC Barbados on 6 July 1962. The linear arrays with hydrophones placed on slopes within the sound channel enabled beamforming processing...

water, sonobuoys have both a radio transmitter above the surface and hydrophone sensors underwater. Sonobuoys are ejected from aircraft in canisters and...

sound pressure can be measured using a microphone, and in water with a hydrophone. The SI unit of sound pressure is the pascal (Pa). A sound wave in a transmission...

towed array sonar is a system of hydrophones towed behind a submarine or a surface ship on a cable. Trailing the hydrophones behind the vessel, on a cable...

the subsurface water cycle. Using both ocean-bottom seismometers and hydrophones, the scientists are able to map structures as deep as 97 kilometres (318...

sound. The British made early use of underwater listening devices called hydrophones, while the French physicist Paul Langevin, working with a Russian immigrant...

The Gruppenhorchgerät ('group listening device', abbreviated GHG) was a hydrophone array which was used on vessels of the German Kriegsmarine in World War...

was detected by the Equatorial Pacific Ocean autonomous hydrophone array, a system of hydrophones primarily used to monitor undersea seismicity, ice noise...

U-boats to find targets, which significantly lessened losses; after the hydrophone and depth charges were introduced, destroyers could potentially successfully...

locations on the surface by what is known as receivers (geophones or hydrophones). Before seismic data can be acquired, a seismic survey needs to be planned...

is used for 3D seismic data acquisition. The ship is equipped with 24 hydrophone streamer reels in two rows, with 16 reels astern, and eight further forward...

southern Indian Ocean (between Africa, Australia and Antarctica), by hydrophones in portions of all five major ocean basins and as distant as the North...

hemisphere, which is primarily ocean. Hydrophone monitoring stations consist of an array of three hydrophones suspended from cables tethered to the ocean...

(18 km/h) and 18 knots (33 km/h). The homing system consisted of two hydrophone receivers and altered the direction of the rudder via an electropneumatic...

weaponry reinforced, while new technologies, such as ASDIC, Huff-Duff and hydrophones, were developed. At the start of World War II in 1939, the Royal Navy...

equipment may be required instead of the usual microphone, such as a hydrophone (for underwater sounds), detectors of ultrasound (very high-frequency...

Iceland. The ships were forced to zigzag to avoid ice floes. At 19:22, hydrophone and radar operators aboard the German warships detected the cruiser HMS Suffolk...

deep-sea volcanoes can be difficult to detect at great distances using hydrophones.[citation needed] The critical temperature and pressure increase in solutions...

noise-reduction). TP613, ca 1982: Development of the TP612 with passive-hydrophone target-seeker and pistol. Two-way data communications, and engine with...

CTBTO hydrophones located south-west of Cape Leeuwin, Western Australia (HA01) and in the northern Indian Ocean. These stations have two hydrophones each...

returned to normal. The US Navy analyzed acoustic data recorded by the SOSUS hydrophone network in the northern Pacific—four AFTAC sites and the Adak, Alaska...

Haixun 01, equipped with a hand-held hydrophone, and the Royal Navy's HMS Echo, equipped with a hull-mounted hydrophone, in the search.: 11–12 : 36  Operators...

protocol has been in use since the latter part of World War I, when hydrophones were invented to detect U-boats. The propellers have a characteristic...

had a curtained bunk which faced 2 small rooms: the radio room and the hydrophone room. Control room. The main large periscope, for general use, was located...

level between the front and back pickup. Three such cardioid microphones/hydrophones could be orthogonally oriented as a collocated triad to improve the gain...

technology for studying seamount eruptions did not exist until advancements in hydrophone technology made it possible to "listen" to acoustic waves, known as T-waves...

Side A No. Title Writer(s) Length 1. "Hydrophone" Max Eastley 8:59 2. "Metallophone" Max Eastley 7:02 3. "The Centriphone" Max Eastley 4:48 4. "Elastic...

surface were measured; ambient noise intensity and direction using vertical hydrophone arrays suspended from FLIP and horizontal arrays (DIMUS) at the bottom...