Rockwool specifies that 50mm Rockwool Flexi heat insulation slab has roughly the same absorbtion as 25mm Rockwool Acoustic Slab. They also manufacture a whole range of acoustic tiles in different shapes and forms, with NRC 0,5 at 125Hz.
Universal Acoustics foam tiles claims relatively average frequency absorbtion with NRC 0,85 and density of 30kg/m3.
Vicoustics foam tiles aren’t as good as other manufacturers, but they are a little more stylish. The 0,5 NRC Cinema Round tiles have a flat absorbtion above 500Hz, which is as expected. Interestingly, the MD55 Light tiles have a non-flat…
Auralex Acoustics makes a few foam panels of different thickness and colours. The 33kg/m3 100mm tiles has an NRC of 1,1 and a flat frequence absorbtion above 300Hz.
Hofa Akustik makes some quite stylish absorbers and basstraps in a variety of colours. At 200Hz, the Basotect material used is claimed by BASF to absorb rougly 50% at 200Hz, and 100% at 500Hz. I’ve found material claiming both better…
Well-renowned EQ Acoustics manufactures some wedge absorbtion tiles with NRC 0,85, which makes them fairly average in performance. A few different colours are available as well. They also provide some larger, flat, tiles made out of quite dense 63kg/m3 fibreglass…
Adam Hall is a well-renowned manufacturer providing a medium density foam absorber at 23kg/m3.
The Thomann t.akustik CBT-37 foam basstrap has no specification at all, but using a bathroom scale I estimate their density to roughly 20kg/m3. This makes them the lightest and cheapest traps I’ve found.
The Thomann t.akustik range of foam absorber tiles, are Thomann-branded, budget material. The only specification given for the HiLo tiles, is their density; At 16,5kg/m3, the material is the lightest material I’ve found, which I believe cases poor performance. It…