I am trying to reduce the noise created from a machine that makes contact (impact) with a thin plate. I just don't have anyone to bounce ideas off of. I can change the support geometry to whatever I want as long as it will with stand a static load and the impact. I can handle this, but the support structure would be my boundary conditions for the thin plate. I would like to put a layer of dampening material under the thin plate to convert some of the energy to heat. I don't know if this is even possible of worth my efforts. Does anyone know of any natural metals that have a dampening property, but are durable as well? It would be neat if I could setup the geometry to push the vibration of the plate to outside of the audible frequency threshold of the human ear, if that would be possible. The model I want to use is the wave equation with an impulse input, but I don't really know how to model a multilayered material Any Ideas would be greatly appreciated.