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sonarclick to hear

Detection system emitting ultrasound; it is used for detection mainly in a marine environment.
sonar echo ship ultrasound waves emission target

echo click to hear

Waves reflected by the target and measured by a remote sensing device.

ship click to hear

ultrasound waves emission click to hear

Production of very high-frequency sound vibrations whose echo is captured and analyzed.

target click to hear

Surface or object from which sonar waves reflect.