I want to learn the maximum speed conditions for a wave in a fluid. I think, Which mechanism causes this limited speed? And How? The water is an understandable example for me. By this question, I hope to understand the inhibitory mechanism of the background.
In my opinion, if the waves created by moving object are existing a Doppler Wall in front of the object, the vibrations of substances of the medium may limit the maximum speed objects according to their vibration frequency.