Yes it is. Despite all the other replies asserting SONAR is active, passive SONAR systems are very much a thing. For my undergraduate project years ago I buil

Yes it is. Despite all the other replies asserting SONAR is active, passive SONAR systems are very much a thing. For my undergraduate project years ago I built a microphone array that could be used to locate noisy objects. I demonstrated it by tracking aircraft taking off at a local airport. Whilst I didn't make 'acoustic photos' with it, I did plot the flight track of the aircraft in real time, and could have a decent crack at identifying it based on frequency content.