SANDWICH ELEMENT FOR SOUND-ABSORBING INNER CLADDING OF TRANSPORT MEANS, ESPECIALLY FOR SOUND-ABSORBING INNER CLADDING OF AIRCRAFT FUSELAGE CELLS

摘要

The invention relates to a sandwich element (1) for a sound-absorbing inner cladding of transport means, especially for a sound-absorbing inner cladding of aircraft fuselage cells, comprising a honeycomb-shaped core structure (2) and cover layers (3, 4) applied to both sides of the core structure (2). According to the invention, at least one cover layer (3, 4) is constructed as permeable to air at least in sections and a covering (6) is disposed at least in sections on at least one cover layer (3, 4), wherein a sound absorption layer (5) is disposed at least in sections in the area of at least one cover layer (3, 4). A plurality of passages (8) in the cover layers (3, 4) allow efficient transmission of the sound impinging on the sandwich element (1) from outside as far as the sound absorption layer (5) of the sandwich element (1) so that this element has excellent sound absorption properties. As a result of the presence of the covering (6), undesirable penetration of foreign bodies and/or moisture especially in the area of the core structure (2) of the sandwich element (1) is largely avoided. In addition to the excellent sound absorption properties, the sandwich element (1) additionally has good mechanical properties and a high heat insulating capability.