초록 ▼

A wall element has a noise attenuating characteristic and is suitable for use as an aircraft cabin interior panel element that is mounted directly on the aircraft fuselage structure. The wall element includes a rigid lightweight composite panel having a core arranged between two cover layers, and an

A wall element has a noise attenuating characteristic and is suitable for use as an aircraft cabin interior panel element that is mounted directly on the aircraft fuselage structure. The wall element includes a rigid lightweight composite panel having a core arranged between two cover layers, and an outer layer arranged adjacent and spaced away from one of the cover layers. The core and the cover layers of the composite panel are air permeable in a direction through the thickness of the panel, while the outer layer is non-air-permeable and is relatively soft and flexible. The outer layer is connected to the composite panel preferably only along the perimeter edge thereof. The non-permeable outer layer faces the aircraft cabin space, while the permeable composite panel is mounted on the fuselage structure. With this structure, acoustic vibrations of the fuselage, to which the wall element is attached, are attenuated and do not result in substantial noise radiation from the outer layer into the cabin.

대표청구항 ▼

[ What is claimed is:] [1.] A wall element comprising:a rigid lightweight composite panel including a core having first and second opposite major surfaces, and first and second cover layers respectively arranged on said first and second opposite major surfaces of said core, anda first outer layer th

[ What is claimed is:] [1.] A wall element comprising:a rigid lightweight composite panel including a core having first and second opposite major surfaces, and first and second cover layers respectively arranged on said first and second opposite major surfaces of said core, anda first outer layer that is arranged spaced away from said first cover layer with a first interspace therebetween, and that is connected to said first cover layer continuously along a perimeter edge of said first outer layer,wherein said first and second cover layers and said core are all air permeable in a direction through a thickness of said composite panel, andwherein said first outer layer comprises a flexible and non-air-permeable layer.