SONAR BASED ON OPTICAL FIBER SEMI DISTRIBUTED ACOUSTIC & VIB

Developer is a Company that develops linear and planar hydrophone arrays. The arrays are designed to be applicable in passive SONAR for listening, monitoring and direction-finding.
SONAR (SOund Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels and submarines. Two types of technology share the name "sonar": passive sonar is essentially listening for the sound made by vessels; active sonar is emitting pulses of sounds and listening for echoes. The Sensing procedure in Sonar System usually is done by Hydrophones.
A hydrophone is a microphone designed to be used underwater for recording or listening to underwater sounds. Most hydrophones are based on a piezoelectric transducer that generates electricity when subjected to a pressure change. Such piezoelectric materials, or transducers, can convert a sound signal into an electrical signal since sound is a pressure wave. The new Technology of making Hydrophone is Acousto-Optic Transducer that made by Fiber Optic Sensing Technology.