Question

when a sound wave is incident on interface of air and water ( from air to water) . how much is it reflected & how much is transmitted? please answer

Answer 1

It depends on something called "acoustic impedance", Za, of the medium.

Za depends on the compressibility and density of the medium and can be expressed as:
Za = ρ . c = density times velocity

In the case of air/water interface, 0.11% of the energy carried by the incident wave is transmitted, and 99.89% is reflected.

Answer 2

but does it also depend on incident angle?

Answer 3

thanks for that answer.

Answer 4

but can you please give some general equation ? @Vincent-Lyon.Fr