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US 8,251,175 B1Granted
Corrugated acoustical panel
AssigneeUSG Interiors, Inc.
InventorsMark Englert, Qing C. Yu
Life of this patent
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AssigneeUSG Interiors, Inc.
InventorsMark Englert, Qing C. Yu
Estimating the term…
An acoustical panel construction useful as a suspended ceiling tile having a rectangular shape bounded by edges and establishing a face area comprising at least one corrugated layer or layers of a total thickness, the layer or layers having a multitude of parallel flutes extending across an expanse of the rectangular shape substantially from one edge of the panel to an opposite edge, the flutes being formed by walls of the layer or layers and being of known volume, a series of apertures each of known area through the wall or walls of the flutes communicating with the atmosphere at the face, the aperture area, flute cavity volume associated with an aperture, and the total thickness of the corrugated layers associated with an aperture being arranged to produce a maximum absorption frequency between 200 and 2,000 Hz.
An acoustical panel useful as a suspended ceiling tile having a rectangular shape bounded by edges and establishing a face area comprising at least one corrugated layer or layers of a total thickness, the layer or layers having a multitude of parallel flutes extending across an expanse of the rectangular shape substantially from one edge of the panel to an opposite edge, the flutes being formed by walls of the layer or layers and being of known volume, a series of apertures each of known area through the wall or walls of the flutes communicating with the atmosphere at the face, the aperture area, flute cavity volume associated with an aperture, and the total thickness of the corrugated layers associated with an aperture being arranged to produce a maximum absorption frequency between 200 and 2,000 Hz.
A method of making an acoustical panel by providing a rigid rectangular sheet having at least one layer of corrugations, the corrugated layer or layers having a plurality of flutes with interior hollow cavities and extending parallel to one another between a pair of edges of the sheet, the sheet having a front face on one side and a rear face on a side opposite the front face, the front face being formed with apertures communicating with the flute cavities, a total thickness of the corrugated layer or layers, the area of an aperture, and the effective volume of a flute cavity associated with an aperture being selected to permit the cavities to operate as pseudo Helmholtz cavities with a maximum sound absorbing frequency of between 200 and 2,000 Hz.
Dependencies are inferred from the claim text.