SOUND ATTENUATION PANEL FOR AIRCRAFT HAVING A COMBINATION OF ACOUSTIC ATTENUATION PROPERTIES
First Claim
1. An acoustic panel for aircraft, the acoustic panel comprising an acoustic structure having a cellular structure and a resistive skin and a backing skin on respective opposite sides of the cellular structure, the acoustic panel comprising at least one auxiliary acoustic device with cavities configured to produce acoustic absorption, the auxiliary acoustic device with cavities being attached to the acoustic structure, the auxiliary acoustic device with cavities comprising a plurality of adjacent chambers separated by shared walls, each of the chambers having perforations and configured to produce acoustic absorption,wherein the auxiliary acoustic device with cavities is on a peripheral edge of the acoustic structure where the acoustic panel comprises an edge part for fixing the acoustic panel and wherein the perforations are on a front face of the auxiliary acoustic device with cavities.
1 Assignment
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Accused Products
Abstract
Sound attenuation panel for aircraft having a combination of acoustic attenuation properties. The acoustic panel includes an acoustic structure having a cellular structure and a resistive skin and a backing skin, the acoustic panel also including at least one auxiliary acoustic device with cavities that is configured to produce additional acoustic absorption, the auxiliary acoustic device with cavities being attached to the acoustic structure and including adjacent chambers or cavities separated by shared walls, each of the chambers or cavities having perforations and being adapted to produce acoustic absorption. The combination of the acoustic structure and the auxiliary acoustic device with cavities enables combination of the acoustic absorption properties of these two types of element and an increased range of frequencies of the noise that can be attenuated by the acoustic panel without increasing its overall size.
1 Citation
17 Claims
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1. An acoustic panel for aircraft, the acoustic panel comprising an acoustic structure having a cellular structure and a resistive skin and a backing skin on respective opposite sides of the cellular structure, the acoustic panel comprising at least one auxiliary acoustic device with cavities configured to produce acoustic absorption, the auxiliary acoustic device with cavities being attached to the acoustic structure, the auxiliary acoustic device with cavities comprising a plurality of adjacent chambers separated by shared walls, each of the chambers having perforations and configured to produce acoustic absorption,
wherein the auxiliary acoustic device with cavities is on a peripheral edge of the acoustic structure where the acoustic panel comprises an edge part for fixing the acoustic panel and wherein the perforations are on a front face of the auxiliary acoustic device with cavities.
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15. A method of manufacturing an acoustic panel, comprising a plurality of steps including at least one curing step and comprising:
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manufacturing an acoustic panel for aircraft, the acoustic panel comprising; an acoustic structure having a cellular structure and a resistive skin and a backing skin on respective opposite sides of the cellular structure, the acoustic panel comprising at least one auxiliary acoustic device with cavities configured to produce acoustic absorption, the auxiliary acoustic device with cavities being attached to the acoustic structure, the auxiliary acoustic device with cavities comprising a plurality of adjacent chambers separated by shared walls, each of the chambers having perforations and configured to produce acoustic absorption, wherein the auxiliary acoustic device with cavities is on a peripheral edge of the acoustic structure where the acoustic panel comprises an edge part for fixing the acoustic panel and wherein the perforations are on a front face of the auxiliary acoustic device with cavities. - View Dependent Claims (16, 17)
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Specification