Do u know any 5 applications of reflection of sound??
During WWII before the invention of radar, the British used acoustic reflectors to detect German bombers as they were flying over the English Channel. There’s something about it on Wikipedia under Mirrors. Sonar pretty much works the same way. Active sonar uses the return signature of an emitted pitch to detect where something is. Passive sonar uses noises in the water to do the same basic thing, but there is very little sound reflection in this case. One submarine tactic is to use sound reflection off of thermoclines, or layers of different temperature water in the ocean. When the temperature changes, the water density changes, causing the sound to be slightly refracted, and not return to the sonar device off of the submarine hull, thereby hiding the submarine with the thermal layer. I was on a submarine for several years and have done this many times.
