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Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water . It involves transmitting acoustic waves into water and recording the time interval between emission and return of a pulse; the resulting time of flight , along with knowledge of the speed of sound in water, allows determining the distance ...
Sonar (sound navigation and ranging or sonic navigation and ranging) [2] is a technique that uses sound propagation (usually underwater, as in submarine navigation ...
Sonar systems are generally used underwater for range finding and detection. Active sonar emits an acoustic signal, or pulse of sound, into the water. The sound bounces off the target object and returns an echo to the sonar transducer. Unlike active sonar, passive sonar does not emit its own signal, which is an advantage for military vessels.
The tone is typically a repeated cadence similar to a traditional power ringing signal (ringtone), but is usually not played synchronously. Various telecommunication groups, such as the Bell System and the General Post Office (GPO) developed standards, in part taken over by the European Telecommunications Standards Institute (ETSI) and other ...
Sonar Systems: Acoustic homing is used in many underwater sonar systems such as on submarines, ships, and fish finders. These systems use sound waves to detect underwater objects, as well as measuring the object's distance and determining the object's relative position. Multiple German G7e torpedoes that use acoustic homing
Underwater vector sensor applications have been focused on sonar and target detection. [11] They have also been proposed to be used as underwater multi‐channel communication receivers and equalizers. [13] Other researchers have used arrays of scalar sensors as multi‐channel equalizers and receivers. [14] [15]
The SD-C cable was the basis for a fourth generation of sonar sets with installation of the Lightweight Undersea Components (LUSC) involving new shore equipment in 1984. In June 1994 an entirely new cable system was introduced with fiber optic cable. [22] Lockheed P-3B of Patrol Squadron 6 (VP-6)
Asdic was the British version of sonar developed at the end of World War I based on the work of French physicist Paul Langevin and Russian engineer M. Constantin Chilowsky. The system was developed as a means to detect and locate submarines by their reflection of sound waves.