Patent ID: 7562743

Claim:
An acoustical dampening barrier, for an opening in a wall, that is translatable to an open position to allow access to said opening, said acoustical dampening barrier comprising: a first barrier layer made of at least one of a rigid and semi-rigid material; a second barrier layer made of an acoustic material with sound attenuation characteristics to block sound transmission through the acoustical dampening barrier, the second barrier layer being fixed to said first barrier layer on a side of said first barrier layer where a sound to dampen is emitted; a third barrier layer made of an acoustic material with sound absorptive characteristics fixed to said second barrier layer on a side of said second barrier layer where a sound to dampen is emitted, wherein said third barrier layer comprises a material with a noise reduction coefficient rating of 0.8 to 1.25; a flexible seal material connected to at least one of said opening in said wall, said first barrier layer and said third barrier layer to further dampen a sound emitted when said acoustical dampening barrier is translated to a closed position to prevent access to said opening; and wherein when the acoustical dampening barrier is translated to a closed position, the acoustical dampening barrier fits at least one of within the opening in the wall and adjacent to said opening in said wall depending where the flexible seal is connected.