Question

Give the reason for using ultrasonic waves in sonar.

Answer 1

1. Sonar (sound navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances, and communicate or detect objects on or under the surface of the water, such as other vessels.
2. Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing.
3. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it.
4. The reason for using ultrasonic waves in sonar is that they can penetrate water too long distances because of their high frequency and short wavelength and it also does not scatter very much.