OWAtecta® perfora: Perfect acoustics, balanced design
The idea of increasing the sound absorption of a tile with micro holes came from China. The product of it comes from us. The development was the result of a joint German-Chinese programme led by the Fraunhofer-Institute for Building Physics (Stuttgart)
The success of this ceiling system is the development of metal ceilings that give optimal sound absorption values and simultaneously maintain the impression of a closed, un-perforated ceiling surface due to the almost invisible microscopic size of the holes.
Open surface - closed appearance
Despite millions of holes in the ceiling tiles, the installed ceiling looks un-perforated. You have to look very closely from a minimal distance to identify the geometry of the micro perforations.
Available Designs
perfora with Cosmos-Coating
High Light reflection
Light planners can reckon with it: The light reflection of the perforated surface hardly deviates from that of a plain un-perforated ceiling. Because only 0.64% of the surface is open the light reflection of the surface stands at over 99%.
The test: Reverberation – with and without micro-perforations
To prove the acoustic principle, a classroom was first equipped with an OWAtecta® (1) closed metal tile ceiling and the reverberation was measured – in each case with and without the presence of students. Then, an OWAtecta® perfora (2) ceiling was installed – and tested under identical conditions. The tiles in this ceiling had approximately 40,000 tiny punched holes in each m² so there were, altogether 2.8 million in the complete ceiling surface.
Test result 1:
The reverberation was represented with two curve lines : Both clearly lay within the values of an optimal reverberation time.
Test result 2:
Here, both curves lie in the area of the required reverberation time that represents optimal acoustic conditions, regardless of how many occupants there were in the area in each case.
International
