Patent ID: 7263028
Filing Date: 2007-08-28
Classification: B32B,G10K

Abstract:
1. An acoustic attenuation and vibration damping material comprising: a first layer of a matrix material with a plurality of at least two species of particles incorporated therein, said particles being species differentiated by their characteristic acoustic impedances, and said particle species being proportionally distributed in said matrix material so that an increase in acoustic attenuating and vibration damping effect of said matrix material with said combination of at least two species of particles incorporated therein, relative to the acoustic attenuating and vibration damping effect of said matrix material with no particles incorporated therein, is greater than the sum of increases in acoustic attenuating and vibration damping effects of each particle species incorporated individually at the same concentration in said matrix material, relative to the acoustic attenuating and vibration damping effect of said matrix material with no particles incorporated therein, and a second layer of decoupling material that is at least partially in physical contact with said first layer, wherein said physical contact between said first layer and said second layer comprises less than ten percent of the surface area of said first layer.