Question

Explain three applications of echo

Answer 1

Answer:

Echo :-

echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is directly proportional to the distance of the reflecting surface from the source and the listener. ... A true echo is a single reflection of the sound source.

Applications :-

• (i) Dolphins detect their enemy and obstacles by emitting the ultrasonic waves and hearing their echo.
• (ii) In medical science, the echo method of ultrasonic waves is used for imaging human organs such as the liver, gall bladder, etc.
• They are also used in SONAR (Sound navigation and ranging) and RADAR(Radio detection and ranging) to detect an obstacle.