Acoustic suspended ceiling with perforated sound-absorbing plasterboard with fleece lamination on the back. There are many different types of perforations, with round or square holes of the same or different diameters, arranged evenly, in blocks or irregularly, or even elongated slots. The sound absorption is influenced in particular by the construction depth (height of the air space in the false ceiling above the acoustic panels), the presence of a mineral wool layer and the proportion of perforated area/hole distribution.
Due to the perforation, an acoustic ceiling has no fire resistance as a room-enclosing component. Suspended ceilings that have requirements for room acoustics and fire protection at the same time must therefore be built on two levels: the acoustic ceiling is then installed under a suspended ceiling with classified fire resistance. Both systems must be coordinated with each other and approved accordingly. In particular, the substructure of the fire protection ceiling must be designed and approved for the additional load caused by the acoustic ceiling.
