Sound-permeable lining for acoustic plasterboards

A sound-permeable lining (1) for covering perforations (21) shaped in an acoustic plasterboard (2), the sound-permeable lining (1) comprising

• a first ply (12) of a fleece material having an inner structure so that the first ply (12) has a first air flow resistivity RS1 which allows for the penetration of air so that sound can propagate via the first ply (12) and attached thereto and
• a second ply (14) which is arranged in between of the first ply (12) and the acoustic plasterboard (2) to which the sound-permeable lining (1) is to be applied, the second ply (14) being of a foil material having a second opacity O2 and a plurality of through-holes (141) formed therein which are of a size and shape so that the second ply (14) has a second air flow resistivity RS2 which allows for the penetration of air so that sound can propagate via the second ply (14),
• wherein
• the first ply (12) has a first opacity O1 so that the through-holes (141) formed in the second ply (14) are invisible through the first ply (12) and so that the applied sound-permeable lining (1) has an overall opacity O12 to allow for optically covering the perforations (21) shaped in the acoustic plasterboard (2) and an overall air flow resistivity RS12 to allow for the penetration of air so that sound can propagate via the sound-permeable lining (1) and
• the second ply (14) comprises a light reflective surface (142) at the side to be attached to the first ply (12) to allow for optically reflecting the first ply (2) thereon.