SOUND-ABSORBING SANDWICH BOARD

摘要

The present invention relates to a sound-absorbing sandwich board (10), comprising: a first layer (20) for sound absorption and/or sound-proofing and a second layer (30) for sound-deadening and/or thermal insulation, which is rigidly connected at its first main face (32) to the first layer (20) and is intended to be connected at its second main face (38) to a component (8) to be improved acoustically. The invention is characterised in that the second layer (30) is a bitumen-plastic foam layer with a density of 0.2 to 0.9 kg/dm3, preferably from 0.25 to 0.5 kg/dm3 and in particular of 0.3 kg/dm3. The invention also relates to a layer for sound absorption and/or for sound-proofing and a sound-deadening layer for the sandwich board (10) and a method for attaching a sound-absorbing sandwich board (10) to a component to be improved acoustically.