# US 8,739,924 B2 · Acoustic panel

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- Number: US 8,739,924 B2
- Document ID: US8739924B2
- Status: Granted
- Kind: B2
- Application number: 12/381,784
- Filed: 2009-03-17
- Published: 2009-07-16
- Granted: 2014-06-03
- Earliest claimed: 2002-06-12
- Assignees: LJ Avalon LLC
- Applicants: Lahnie Johnson
- Inventors: Lahnie Johnson
- Web page: https://patentgrep.com/patent/US8739924B2

## CPC

- E04B 1/86: slab-shaped
- E04B 9/0428: {having a closed frame around the periphery}
- E04B 9/0464: {having irregularities on the faces, e.g. holes, grooves}
- E04B 9/0485: {containing a filling element}
- E04B 9/34: {Grid-like or} open-work ceilings, e.g. lattice type {box-like modules, acoustic baffles} (E04B9/30 takes precedence)
- G10K 11/168: Plural layers of different materials, e.g. sandwiches
- E04B 2001/8452: {with peripheral frame members}
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})
- G10K: SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR

## Abstract

An apparatus and method is disclosed for an improved acoustic panel comprising a sound absorbing member defined by a first and second face surface and a plurality of peripheral edges. A sound blocking member is defined by a first and second face surface and a plurality of peripheral edge. The first face surface of the sound blocking member is secured relative to the second face surface of the sound absorbing member for blocking the transmission of sound therethrough. In another embodiment, the first face surface of the sound blocking member is spaced relative to the second face surface of the sound absorbing member for decoupling the sound blocking member from the sound absorbing member.

## Claims

### Claim 1

A fire resistant acoustic panel, comprising:
a sound absorbing member defined by a first and second face surface and a peripheral edge;
a sound blocking member secured to said second face surface of said sound absorbing member by an adhesive layer for blocking the transmission of sound through the sound reducing panel;
said sound blocking member being spaced from said second face surface of said sound absorbing member by a spacing sound absorbing member;
said sound blocking member comprising a sheet of mineral filled polymeric material having a thickness of approximately one-eighth of an inch and a weight equal to or greater than one pound per square foot;
a porous covering sheet overlaying said first face of said sound absorbing member,
said porous covering sheet being formed from a fire retardant acoustically transparent material; and
said porous covering sheet overlays said outer peripheral edges of said sound absorbing member.

### Claim 2 (depends on 1)

A fire resistant acoustic panel as set forth in claim 1, wherein said sound blocking member has a sound transmission class greater than 25.

### Claim 3 (depends on 1)

A fire resistant acoustic panel as set forth in claim 1, including an inner support frame defined within said sound absorbing member for inhibiting deformation of said sound absorbing member; and
said inner support frame including a curable polymeric material impregnated into an interior portion of said sound absorbing member.

### Claim 4

A fire resistant acoustic panel for use with a suspended ceiling support frame, comprising:
a sound absorbing member defined by a first and second face surface and a plurality of peripheral edges;
a sound blocking member defined by a first and second face surface and a plurality of peripheral edges;
said second face surface of said sound blocking member being adhesively secured to said second face surface of said sound absorbing member for blocking the transmission of sound through the sound reducing panel;
said sound blocking member comprising a sheet of mineral filled polymeric material having a thickness of approximately one-eighth of an inch and having a weight equal to or greater than one pound per square foot;
said sound blocking member having a sound transmission class greater than 25;
an inner frame comprising a curable polymeric material impregnated into an interior portion of said sound absorbing member;
a porous covering sheet overlaying said first face of said sound absorbing member with said peripheral edges of said porous covering sheet overlaying said outer peripheral edges of said sound absorbing member;
said porous covering sheet formed from a fire retardant acoustically transparent material; and
a mounting for supporting the improved acoustic panel.