Page 23 - Laqfoil Aterial Catalogue

Sound waves from sources in the room are partially absorbed through the holes in the perforated membrane, while air in the pores offers resistance to the initial sound wave, partially transforming it into heat energy. Air in the space created between the existing ceiling and the perforated membrane provides additional resistance. Further vibrations of reflected sound waves are absorbed by the two layers of stretched ceiling, thereby ensuring that the reverberation time in the room is significantly reduced.
Absorption efficiency characteristics:
џ Diameter of the perforations
џ Distance between perforations
џ Thickness of the PVC membrane
џ Distance between the stretch ceiling and the original ceiling
Type 1:
џ Diameter of perforations: 1mm
џ Distance between perforations: 2mm џ 250,000 holes/square metre
џ Thickness: 0.17mm
Type 2:
џ Diameter of perforations: 1.3mm
џ Distance between perforations: 8mm џ 20,000 holes/square metre
џ Thickness: 0.17mm
Distance
between perforations 2.0 mm
Distance
between perforations 8.0 mm
Diameter of perforations 1.0 mm
Diameter of perforations 1.3 mm
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