So I’m a super villain, I’ve captured a hero with the ability to manipulate sound and I’m having a hard time keeping him from escaping.
This super human can create and manipulate sounds at just about any frequency he wants. He can hold low amplitudes for a long period of time, but very high amplitude sounds seem to be very taxing on him, and he can only use short pulses which seem to have about the same energy as the sonic boom from a jet at his maximum.
You might think I could just use ear plugs, but since sounds are vibrations that means he can vibrate the walls of his prison until it shakes apart. I’ve not been able to find a way to directly suppress his abilities, and he doesn’t seem to be running out of energy any time soon.
So I need to know what kind of materials will reduce the effectiveness of his powers or even cancel them out completely. It would also be helpful to know what materials I should keep away from him at all costs. Whoever has the best answer can have extra cookies after I take over the world!