A good way of thinking about the problem is that you're essentially trying to create an "impedance mismatch" to prevent transmitting pressure waves in much the same way that an impedance mismatch works electronically and limits transmission power.

Haha a good way to think about it, it is true its a good way, but really only here on HN.

You'll be excited to learn that acoustic impedance is a well-known concept to anyone who researches acoustics!