Sound attenuating building panels

1. An acoustical ceiling panel comprising:

a first layer comprising a first major surface opposite a second major surface and a side surface extending there-between, the first layer having a first thickness measured between the first and second major surfaces of the first layer;

a second layer comprising a first major surface opposite a second major surface and a side surface extending there-between, the second layer having a second thickness measured between the first and second major surfaces of the second layer;

a sealing layer having a first major surface opposite a second major surface and a side surface extending there-between, the sealing layer having a third thickness measured between the first and second major surfaces of the sealing layer, the third thickness being less than each of the first and second thicknesses; and

wherein the sealing layer is positioned between the first major surface of the first layer and the second major surface of the second layer, and wherein the side surface of the sealing layer extends beyond the side surface of the first layer and the side surface of the second layer; and

wherein the first major surface of the first layer has a first surface area, the second major surface of the second layer has a second surface area, and the first major surface of the sealing layer has a third surface area, the third surface area being greater than each of the first and second surface areas.

2. The acoustical ceiling panel according to claim 1 , wherein a first ratio of the third surface area to the first surface area ranges from 1.02:1 to 1.03:1, and a second ratio of the third surface area to the second surface area ranges from 1.08:1 to 1.1:1.

3. The acoustical ceiling panel according to claim 1 , wherein a third ratio of the first surface area to the second surface area ranges from 1.06:1 to 1.07:1.

4. The acoustical ceiling panel according to claim 1 , wherein the first thickness of the first layer ranges from 0.25 inches to 3.0 inches, and wherein the first layer comprises a first body formed of fibrous material, and wherein the second thickness of the second layer ranges from 0.25 inches to 3.0 inches, and wherein the second layer includes a second body comprising a sound attenuation material.

5. The acoustical ceiling panel according to claim 1 , wherein the first layer is formed from a fibrous material, the second layer is formed from a sound attenuation material, and the sealing layer is formed from a flexible material.

6. The acoustical ceiling panel according to claim 1 , wherein third thickness of the sealing layer ranges from 0.015 inches to 1.0 inches, and wherein the sealing layer is formed of a flexible material.

7. The acoustical ceiling panel according to claim 1 , wherein the side surface of the first layer defines a first perimeter of the first layer, the side surface of the second layer defines a second perimeter of the second layer, and the side surface of the sealing layer defines a third perimeter of the sealing layer, the sealing layer comprising a perimeter region adjacent to the third perimeter and a central region circumscribed by the perimeter region, and wherein the perimeter region of the sealing layer protrudes beyond the side surfaces of the first and second layers along an entirety of the first perimeter of the first layer and an entirety of the second perimeter of the second layer.

8. An acoustical ceiling panel comprising:

a first layer comprising a first major surface opposite a second major surface and a side surface extending there-between, the side surface of the first layer defining a first perimeter of the first layer;

a second layer comprising a first major surface opposite a second major surface and a side surface extending there-between, the side surface of the second layer defining a second perimeter of the second layer;

a sealing layer comprising a first major surface opposite a second major surface and a side surface extending there-between, the side surface of the sealing layer defining a third perimeter of the sealing layer, the sealing layer further comprising a perimeter region adjacent the third perimeter and a central region circumscribed by the perimeter region of the sealing layer; and

wherein the sealing layer is positioned between the first layer and the second layer such that the perimeter region of the sealing layer protrudes beyond the side surfaces of the first and second layers along an entirety of the first perimeter of the first layer and an entirety of the second perimeter of the second layer, and wherein the perimeter region of the sealing layer can flex upward and downward relative to the central region of the sealing layer.

9. The acoustical ceiling panel according to claim 8 , wherein the perimeter region of the sealing layer can flex so as to contact the side surface of the first layer and the side surface of the second layer.

10. The acoustical ceiling panel according to claim 8 , wherein the central region of the sealing layer overlaps with the first major surface of the first layer and with at least a portion of the second major surface of the second layer, and wherein the perimeter region of the sealing layer does not overlap with the first major surface of the first layer or with the second major surface of the second layer.

11. The acoustical ceiling panel according to claim 8 , wherein the sealing layer has a planar top surface and a planar bottom surface, the planar top and bottom surfaces being parallel to an exposed top surface of the acoustical ceiling panel and to an exposed bottom surface of the acoustical ceiling panel.

12. The acoustical ceiling panel according to claim 8 , wherein the perimeter region of the sealing layer has a constant thickness measured between the first and second major surfaces of the sealing layer.

13. The acoustical ceiling panel according to claim 8 , wherein the first layer has a first thickness measured between the first and second major surfaces of the first layer, the second layer has a second thickness measured between the first and second major surfaces of the second layer, and the sealing layer has a third thickness measured between the first and second major surfaces of the sealing layer, the third thickness being less than the first and second thicknesses.

14. The acoustical ceiling panel according to claim 8 , wherein the first layer is formed of a fibrous material, the second layer is formed of a sound attenuation material, and the third layer is formed of a flexible material.

15. An acoustical ceiling panel comprising a first exposed major surface opposite a second exposed major surface and an exposed side surface extending there-between, the exposed side surface comprising:

a first portion that is adjacent to the first exposed major surface;

a second portion that is adjacent to the second exposed major surface; and

a third portion located between the first portion and the second portion;

wherein the third portion extends outward beyond the first and second portions along at least two non-adjacent sides of the exposed side surface;

wherein the first portion has a first thickness, the second portion has a second thickness, and the third portion has a third thickness, the third thickness being less than each of the first and second thicknesses; and

wherein the first portion of the exposed side surface is formed of a fibrous material, the second portion of the exposed side surface is formed of a sound attenuation material, and the third portion of the exposed side surface is formed of a flexible material.

16. The acoustical ceiling panel according to claim 15 , wherein the fibrous material comprises inorganic fiber selected from the group consisting of mineral wool, rock wool, stone wool, and glass fibers, the sound attenuation material is selected from the group consisting of gypsum, cement board, granite, and ceramic board, and the flexible material is a polymeric material selected from closed cell foam and mass-loaded vinyl.

17. The acoustical ceiling panel according to claim 15 , wherein the third portion of the exposed side surface comprises an upper side surface opposite a lower side surface and an edge extending therebetween, wherein the edge of the third portion comprises a first edge portion and a second edge portion, the first edge portion extending from the upper side surface of the third portion to the second edge portion, and the second edge portion extending from the first edge portion to the lower side surface of the third portion of the exposed side surface, wherein at least one of the first edge portion and the second edge portion extend at an angle that is oblique to the upper side surface and the lower side surface of the third portion of the exposed side surface.

18. The acoustical ceiling panel according to claim 15 , wherein the third portion of the exposed side surface is configured to flex upwardly towards the first exposed major surface and downwardly towards the second exposed major surface relative to the first and second portions of the exposed side surface.

19. The acoustical ceiling panel according to claim 15 , wherein the third portion extends outward beyond the first and second portions along all sides of the exposed side surface.