Which type of wave is used in sonar to detect objects

Answer 1

Sonar (Sound Navigation and Ranging) uses sound waves to detect objects underwater. It typically employs both active and passive sonar methods. In active sonar, sound waves are emitted and then reflected off objects, allowing for their detection and ranging based on the time it takes for the echoes to return. In passive sonar, the system simply listens for sounds emitted by objects (such as submarines or marine life) without transmitting any signals. The types of sound waves used in sonar are typically within the ultrasonic range, which are sound frequencies higher than the audible range for humans.