Absorber Systems
In many areas installation of noise absorbers will greatly help to reduce the sound energy level in a room, but not least radically improve the reverberation.
This means that even in a room with a relatively high noise level, experience of being in the room is highly improved to a stage where fatigue and physical discomfort is reduced and it becomes possible to understand normal speech.
The simplest and most effective way to obtain this is installing open Rockwool Marine Slab 80, for areas where open insulation is allowed, directly on bulkheads and decks with standard pin’s and washers. Minimum 50 mm and preferably 2 x 50 mm thickness.
In theory you should aim for a thickness of 1/4 of the wavelength for the frequency needed to absorb, but often this is not possible in practice, and by 100 mm insulation very good results will also be achieved.
Investigations and measurements have shown that the Rockwool Marine Slab 80 will be the best compromise in ratio of weight and noise absorption. And to obtain best possible results it is highly recommended to make two layers with an air gab between the layers of approx 5 -15 mm. This enhances both reduction and absorption values.
Please see cut outs from measuring data:
Absorption:
2 x 50 mm Rockwool Marine Slab 80
