Patent ID: 9567742
Date: 2017-02-14
CPC Classifications: B32B,E04B,E04F,G10K

Claim:
1. An acoustic damping building material comprising; a substrate and an acoustic damping layer, the acoustic damping layer being secured to a face of the substrate, at least a portion of the face being uncovered by the acoustic damping layer, the acoustic damping layer comprising at least two media, wherein a first media of the at least two media has a surface area defining a generally irregularly shaped particle, wherein the media are interspersed in a manner such that some of the irregularly shaped particles of the first media are in direct contact with adjacent irregularly shaped particles of the same media, and some other of the irregularly shaped particles of the first media are isolated from and do not contact other irregularly shaped particles of the same media, wherein the at least two media are configured such that the acoustic damping layer comprises at least one direct energy transmission pathway and at least one indirect energy transmission pathway through the acoustic damping layer to the substrate, the direct energy transmission pathway comprising two contiguous irregularly shaped particles of the first media, the indirect energy transmission pathway comprising an irregularly shaped particle of the first media and a second media, said second media having a different transmission coefficient to that of the first media.