Question

Give two practical application of reflection of sound waves.

Answer 1

Answer:

SONAR (sound navigation and ranging) is used in ships to determine the depth of the sea by using sending an ultrasonic wave, which would reflect back and return after a particular time.

Some animals like bats and dolphins use ultrasonic waves which reflect back to determine their surrounding environment, helping them move in the dark.

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Answer 2

Answer:

(i) Hearing aid: It is a device used by the people who are hard of hearing. ...

(ii) Sound boards: Curved surfaces can reflect sound waves. This reflection of sound waves is used in auditorium to spread the waves uniformly throughout the hall.