Perforation
Panels are either plain or perforated
The standard perforation is 1.8mm dia. holes on 3.3mm diagonal square pattern giving a 19%open area.Perforation with 2.3mm, 5mm and other diameters are also available
Sound Absorption
The back of the perforated panels comes with acoustic material, Soundtex. This material is non-flammable and meets the requirement of building material class B1.
SOUNDTEX acoustic non-woven, in conjunction with perforated steel sheet panels, has been tested for its sound absorption performance by the German Fraunhofer institute for Constructional Physic (IBP) in Stuttgart under the certification Mark P-BA 290/1996 to P-BA 292/1996 in accordance with DIN/EN 20 354:1993
The Noise Reduction Coefficient(NRC) was calculated in accordance with ASTM C423-90a.
The degree of Sound Absorption was determined as follow for three perforation patterns with a ceiling cavity of 400mm.
Measurement 1 : 2.5mm diameter holes at 16% open area
Frequency |
125 |
250 |
500 |
1000 |
2000 |
4000 |
| Abs. Coeff |
0.45 |
0.80 |
0.65 |
0.72 |
0.78 |
0.74 |
Measurement 2 : 1.8mm diameter holes at 20% open area
Frequency |
125 |
250 |
500 |
1000 |
2000 |
4000 |
| Abs. Coeff |
0.64 |
0.80 |
0.58 |
0.70 |
0.76 |
0.75 |
Measurement 3 : 1.6mm diameter holes at 25% open area
Frequency |
125 |
250 |
500 |
1000 |
2000 |
4000 |
| Abs. Coeff |
0.60 |
0.83 |
0.56 |
0.67 |
0.75 |
0.73 |
The Panels
Material : 0.5 - 0.8mm thick aluminium plate. Other thickness available on request.
Weight : Average~1.83kg per square meter
Surface Finish : Polyester powder-coated
Dimension :
300mm x 600mm
600mm x 600mm
300mm x 300mm
and other sizes
Colour : White or other colours available on request.
aluminium honeycomb panel aluminium honeycomb ceiling
Aluminum Honeycomb ceiling, brand new building material
Aluminium honeycomb ceiling
