Wall structure for absorption of airborne sound comprises two boundary layers and a compound separation layer forming spaces which are filled with an absorption material

摘要

The wall structure (10) for absorption of airborne sound comprises two boundary layers (16, 20) and a compound separation layer (18) forming space (22, 24) which are filled with a fibrous or open-cell absorption material. The separation layer consists of two parallel areal elements separated by a thin glue layer allowing relative motion between these parallel elements to take place.