Structural acoustic attenuation panel

A sound-attenuating panel and structural technology, applied in the direction of sound-generating equipment, instruments, etc., can solve the problems of cumbersome manufacturing, increase production cost and maintenance cost, etc., and achieve the effect of reducing assembly steps, increasing effective acoustic surface, and simplifying assembly.

Inactive Publication Date: 2014-06-11
AIRCELLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Also, such boards are cumbersome to manufacture, which increases production costs and associated maintenance costs

Method used

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  • Structural acoustic attenuation panel
  • Structural acoustic attenuation panel
  • Structural acoustic attenuation panel

Examples

Experimental program
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Embodiment Construction

[0058] Referring to Figures 1a to 1d, the sound attenuating panel 100 comprises:

[0059] - an acoustically resistive surface 110 with acoustic holes,

[0060] - solid skin 120,

[0061] - an acoustic structure 130 comprising sound absorbing material and arranged between said acoustically resistive skin 110 and the solid skin 120 .

[0062] As shown in these figures, the acoustic structure 130 may include a honeycomb structure formed of honeycomb core units or NIDA.

[0063] In an alternative embodiment, it may include a porous material with sound absorbing properties instead of the NIDA structure.

[0064] Such porous materials have an open structure, ie, open cells capable of absorbing acoustic energy.

[0065] For example, the porous material mentioned above may be made of a foam-type material or a material in an expanded form.

[0066] Such an acoustic structure 130 may or may not be of the distributed acoustic type.

[0067] The acoustic structure 130 may comprise one ...

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PUM

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Abstract

The invention relates to an acoustic attenuation panel (100) which includes the following main elements: a resistive skin (110) having acoustic holes; a solid skin (120); an acoustic structure (130) including a sound-absorbing material and arranged between the resistive skin (110) and the solid skin (120), characterised in that the solid skin (120) is structural and is configured in order to form at least one transverse spacer (121, 122) between the solid skin (120) and the resistive skin (110) of the acoustic attenuation panel (100).

Description

technical field [0001] The present invention relates to a sound-attenuating panel for a turbojet engine nacelle, to a nacelle element equipped with such a panel, and to a related manufacturing method. Background technique [0002] The use of sound attenuating panels in turbine engine nacelles, in particular by trapping noise, to reduce noise emissions from turbojet engines is known in the prior art. [0003] These panels usually include sound absorbing material of the hollow core structure type (commonly referred to as a "honeycomb" structure) or porous material structure type. [0004] This sound-absorbing material is covered on its underside, that is to say, the side not in contact with the air flow in the cabin, which has an air-impermeable inner skin, called "solid", for acoustic reflection device. [0005] This sound-absorbing material is also covered on the opposite upper side, that is to say, the side in contact with the air flow in the cabin, which has a perforated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/172
CPCG10K11/172G10K11/168G10K11/002
Inventor 居·伯纳德·沃琪尔埃里克·皮隆克里斯多夫·玛胡
Owner AIRCELLE
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