Reduction Measurements


Ødegaard Danneskiold-Samsøe A/S has performed a range of example tests
of reduction measurements.


Please also see the website, www.rockwool-marine.com
Measurement according to ISO 15186-1:2000 and ISO 717-1:1996

Different types of steel bulkhead/deck constructions have been made and
insulated with different Rockwool products/solutions. Please note these test results
are to be seen as example guidelines. It is important to ensure all edges
and joints are made correctly, otherwise less reduction values could be seen.



When installing, for example, an A-60 Bulkhead solution by Rockwool Marine
Firebatts 130, 2 x 30/30 mm, a built-up with a different steel design could possibly
result in a change in the real life reduction dB(A) value. This could result
in for example an even 5 - 10 dB(A) better result.



Overview - reduction measurements
NoRockwool ProductsWeighted absorption
1 Marine Slab 80, 2 x 50 mm with 5 - 10 mm air gap Rw = 49 dB
2 Marine Firebatts 130, 2 x 30 mm / 30 mm Rw = 48 dB
3 Marine Firebatts 130, 2 x 30 mm / 30 mm with 19 ?m foil perforeted plate Rw = 47 dB
4 Marine Firebatts 130, 40 mm with 1 mm steel sheet Rw = 56 dB
5 Marine Wired Mat 90, 2 x 45 mm with 1 mm steel sheet Rw = 58 dB
6 Marine Firebatts 100, 60 mm + 25 mm strips on L-profiles Rw = 45 dB
7 Marine Firebatts 100, 60 mm GW 200 plus tape Rw = 45 dB
8 Marine Firebatts 100 Alu, 60 / 25 mm Rw = 46 dB
9 Marine Batts 45, 50 / 25 mm strips on L-profiles and 25 mm panel Rw = 62 dB

Related subjects

Dynamic Stiffness Sound Absorption Sound Measurements