Custom Audio Designs Ltd 

Acoustic Screens | Sound Screens | Office Panels | Industrial Screens


rpg variscreen acoustic screenrpg variscreen acoustic screenrpg variscreen acoustic screenrpg variscreen acoustic screenrpg variscreen acoustic screen


RPG FlutterFree Absorption Coefficients
Using slotted Flutterfree Strips




The absorption coefficient data was measured without any spacing between the FlutterFree planks. Surface mount refers to a C mounting with fiberglass on the boundary. The Cavity mount refers to a D mounting with a cavity depth (89 mm). For extended low frequency absorption the FlutterFree Helmholtz mounting may be used in conjunction with the slotted planks.

Mount:SurfaceCavity
Slot Width6.35mm6.35mm
Slot Spacing28.6mm28.6mm
FlutterFree Width25mm25mm
FlutterFree Thickness25mm25mm
Backing25mm acoustic mineral wool25mm acoustic mineral wool
Cavity Depth089mm
Total Thickness51mm140mm
HzAbsorption Coefficient
1000.100.35
1250.080.41
1600.140.43
2000.210.60
2500.320.77
3150.620.97
4000.851.01
5001.170.91
6301.090.83
8000.810.71
10000.580.61
12500.450.55
16000.380.50
20000.340.42
25000.320.38
31500.330.38
40000.430.44
50000.480.49


All information contained in these details is given in good faith but without warranty.
Custom Audio Designs reserves the right to alter the specifications of any product without notice.
©Custom Audio Designs