Recent content by cowboy3

No they are independent. The way they separate different frequencies in radio for instance is using a tuned circuit like a narrow band filter. Tuning that to different frequencies separates out each one.

I think the term acoustic radar and sodar are commonly used for sonar in air though sonar is correct also.

I came across an article in American Journal of Physics recently that describes how to build an acoustic radar by transmitting a carrier modulated with pseudo-noise code through a speaker and simultaneously receiving the reflection with a directional microphone. One then does some signal...