Plate-shaped element for a sound-absorber system comprises recesses in an absorber element side in the form of rectangles whose length and width are greater than the width of grooves in a visible element side

摘要

Plate-shaped sound-absorber system element comprises recesses that extend from both main surfaces and meet inside the element and partially overlap to create passages through the element. The visible element side facing the sound source has grooves. The recesses of the absorber element side are rectangles whose length and width are greater than the width of the grooves. An independent claim is also included for the production of the above plate-shaped sound absorber system element. Preferred Features: The element is made of fibrous plaster.