4sound®
4sound® is a system of sound absorbing wall and ceiling panelling consisting of MDF slats or tile with horizontal milled grooves in the top face and holes in the underside which create Helmholtz resonators. The types available differ in the size of the mills (2 or 3 mm) and their spacing (11, 16, or 32 mm) P11F02 – P16F02 – P16F03 – P32F03. Different mill layouts deliver different acoustic performances. The panels have a low formaldehyde content (E1) and are available with Eurocode “B-s1,d0” reaction to fire and CE marking for construction materials.