US 11,808,037 B2
High sound attenuation building panels
Peter J Oleske, Lancaster, PA (US); Robert C. Garman, Millersville, PA (US); Jacob D. Peterson, Lancaster, PA (US); and Stephen G. Mearig, Lititz, PA (US)
Assigned to AWI Licensing LLC, Wilmington, DE (US)
Filed by ARMSTRONG WORLD INDUSTRIES, INC., Lancaster, PA (US)
Filed on Aug. 30, 2022, as Appl. No. 17/899,268.
Application 17/899,268 is a continuation of application No. 16/447,621, filed on Jun. 20, 2019, granted, now 11,459,752.
Claims priority of provisional application 62/692,995, filed on Jul. 2, 2018.
Prior Publication US 2022/0412083 A1, Dec. 29, 2022
Int. Cl. E04B 9/00 (2006.01); E04B 1/86 (2006.01); E04B 1/84 (2006.01)
CPC E04B 9/001 (2013.01) [E04B 1/86 (2013.01); E04B 2001/8461 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A ceiling system comprising:
a ceiling grid comprising a plurality of first members and a plurality of second members, the first and second members intersecting one another to define a plurality of grid openings;
a plenary space above the ceiling grid;
a room environment below the ceiling grid; and
an acoustical ceiling panel comprising a first exposed major surface opposite a second exposed major surface and an exposed side surface extending between the first and second exposed major surfaces, the acoustical ceiling panel mounted to the ceiling grid and positioned within the grid opening, the acoustic ceiling panel comprising:
a first air-permeable body comprising a first major surface opposite a second major surface and a side surface extending between the first and second major surfaces, the first air-permeable body having an NRC value of at least 0.5 as measured between the first and second major surfaces of the first air-permeable body; and
an attenuation coating applied to the second major surface of the first air-permeable body and the side surface of the first air-permeable body, whereby the attenuation coating seals at least a portion of the second major surface and the side surface of the first air-permeable body; and
wherein the first major surface of the first air-permeable body faces the room environment; and
wherein the first exposed major surface of the acoustical ceiling panel comprises the entirety of the first major surface of the first air-permeable body.