Sandwich element for sound-absorbing inner cladding of transport means, especially for sound-absorbing inner cladding of aircraft fuselage cells

A sandwich element for a sound-absorbing inner cladding of aircraft fuselage cells, the sandwich element comprising:

• a honeycomb-shaped core structure and cover layers applied to both sides of the core structure,
• wherein both cover layers each have a plurality of passages for sound transmission and wherein a covering formed using a semi-permeable membrane of a plastic material is disposed on the cover layer facing to the sound,
• wherein the semi-permeable membrane made of the plastic material comprises a plurality of openings with a cross-sectional area such that the penetration of foreign bodies and/or liquids is largely prevented and sound transmission is allowed, and a sound absorption layer is formed on the cover layer facing away from the sound.