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A 4-inch (100 mm) underwater locator beacon, with ballpoint pen for scale A ULB attached to a bracket on a cockpit voice recorder. An underwater locator beacon (ULB), underwater locating device (ULD), or underwater acoustic beacon is a device that emits an acoustic pulse intended to guide searchers equipped with a suitable receiver to the location of the beacon underwater.
Sónar is a festival dedicated to music, creativity and technology, founded in Barcelona in 1994 by Ricard Robles, Enric Palau, and Sergi Caballero.The festival has been divided into two parts since its inception: Sónar by Day and Sónar by Night, with a three-day congress, Sónar+D dedicated to Creativity, Technology and Business running concurrently since 2013.
A towed pinger locator is a water-borne device used to locate the sonar "ping" from the underwater locator beacon which is fitted to the Cockpit Voice Recorders and Flight Data Recorders installed in commercial airliners. [1] They can locate pingers at depths of up to 20,000 feet (6,100 m) underwater. [2]
Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. [4] Acoustic location in air was used before the introduction of radar. Sonar may also be used for robot navigation, [5] and sodar (an upward-looking in-air sonar
A cockpit voice recorder (CVR) is a flight recorder used to record the audio environment in the flight deck of an aircraft for the purpose of investigation of accidents and incidents. This is typically achieved by recording the signals of the microphones and earphones of the pilots' headsets and of an area microphone in the roof of the cockpit ...
Each system, from shore facility to the transducer array was a sonar set with the signal processing beginning as the array's signals were amplified, processed into beams by time delay and each beam processed by an electromechanical spectrum analyzer with the display being a sweep of the frequency spectrum's intensity burned across electrostatic ...
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.
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]
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