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US 12,539,958 B2Granted
Sandwich panel with noise dampening
AssigneeThe Boeing Company
InventorUmamaheswaran Shanmugam
Life of this patent
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Abstract
A sandwich panel comprising a first layer, a second layer, and a core layer located between the first layer and the second layer. The core layer is comprised of structures connected by channels. The structures and the channels reflect sound waves entering the core layer.
Claims24
A sandwich panel comprising:
- a first layer, wherein the first layer is comprised of a number of porous materials that dissipate energy in sound waves passing through the first layer;
- a second layer, wherein the second layer is comprised of the number of porous materials that dissipate the energy in the sound waves passing through the second layer;
- and
- a core layer located between the first layer and the second layer, wherein the core layer is comprised of non-porous structures connected by channels and wherein the structures and the channels reflect sound waves entering the core layer from the first or second layer as the sound waves travel through the structures in order to increase the distance that the sound waves travel, wherein the first or second layer is configured to attempt to absorb any remaining energy in sound waves that reach the first or second layer from the core layer.
1 more element
A sandwich panel comprising:
- a first layer comprised of a number of porous materials that dissipate energy in sound waves passing through the first layer;
- a core layer, wherein the core layer is comprised of non-porous structures connected by channels and wherein the structures and the channels reflect sound waves entering the core layer from the first layer such that at least one of a wavelength of the sound waves increases in length or a frequency of the sound waves decreases;
- and
- a second layer comprised of the number of porous materials that dissipate any remaining energy in the sound waves from the core layer passing through the second layer into an interior of an aircraft, wherein the core layer is located between the first layer and the second layer.
1 more element
A method of damping sound waves, the method comprising:
- dissipating energy in sound waves using a first layer in a sandwich panel, wherein the first layer is comprised of porous materials;
- reflecting the sound waves through non-porous structures connected by channels in a core layer in the sandwich panel, wherein the sound waves enter the core layer from the first layer;
- and
- dissipating the energy in the sound waves that travel through a second layer in the sandwich panel from the core layer, wherein the second layer is comprised of porous materials, and wherein the sound waves entering an interior of a platform are dampened.
1 more element
A method of reducing a frequency of sound waves passing through a sandwich panel, the method comprising:
- absorbing at least a portion of sound waves passing through a first layer of the sandwich panel, wherein the first layer is comprised of porous material;
- passing sound waves from the first layer of the sandwich panel across a core layer of the sandwich panel;
- and
- reflecting and transferring the sound waves which hit a corner of a material in non-porous structures between the structures through channels in a second layer of the sandwich panel, wherein the second layer is comprised of porous material.
1 more element
Dependencies are inferred from the claim text.