Question

give two piratical application of reflection of sound waves​

Answer 1

Two practical applications of reflection of sound waves: (i) Hearing aid: It is a device used by the people who are hard of hearing. Here the sound waves, which are received by the hearing aid are reflected into a narrower area leading to the ear. (ii) Sound boards: Curved surfaces can reflect sound waves

Answer 2

it is used to measure depth of seas