an acoustical dampening barrier , for an opening in a wall , that is translatable to an open position to allow access to the opening , the fixed barrier including a first barrier layer made of at least one of a rigid and semi - rigid material , a second barrier layer fixed to the first barrier layer on a side of the first barrier layer where a sound to dampen is emitted made of an acoustic material with sound attenuation characteristics , a third barrier layer fixed to the second barrier layer on a side of the second barrier layer where a sound to dampen is emitted made of an acoustic material with sound absorptive characteristics , and a seal material connected to at least one of the opening in the wall , the first barrier layer and the third barrier layer to further dampen a sound emitted when the fixed barrier is translated to a closed position to prevent access to the opening .