natural wool bass traps

[shabby road]

Hello i am considering buying natural wool insulation slabs (see link below) to construct 2 meter high superchunk bass traps in all four corners of my small studio. i would use the method discussed on the forum where material is cut into triangles with a 600mm outward face stacked floor to ceiling.

[url]http://www.theecostore.co.uk/eco-store/ ... leece//url]

http://www.theecostore.co.uk/eco-store/ ... rmafleece/

The highest density available in the wool is 31kg/m3 would this be suitable i know its on the low side.

Many thanks

[Soundman2020]

would this be suitable

The simple answer here is: "it all depends"...

Unless they publish the actual acoustic specs for that product, as measured in a reputable independent acoustic lab, then there's not much that anyone can say.

The highest density available in the wool is 31kg/m3 ... its on the low side

It might be too high, t might be too low, or it might be fine. There's no way to know unless they tested it and reported on the tests. If we are talking about the correct insulation to use in isolation walls, then 50 kg/m3 is right for mineral wool, 30 kg/m3 is right for fiberglass wool, but who knows what is right for this stuff? It could be anything at all... And since we are talking about bass traps here, not isolation walls, there really is no way of guessing how well it would work. Or not work.

I would call them and ask them for their complete acoustic specs. If they don't have any, then forget it and find another product.

- Stuart -

[shabby road]

Hi Stuart thanks for the reply as suggested i called thermafleece today and i received the info below. i cant pretend to understand what these details mean in terms of bass trap suitability any opinion?

Many Thanks

Tim

Ultrawool 90mm thick
-Density 31kg M3
-Sound absorption – NRC 1.10 @ 90mm
-Sound reduction – Rw 41dB – 54dB @ 70mm
-Vapour Resistivity: 9 MN·s·g–1m–1


Practical absorbtion co-efficients at 90mm thickness
125hz=0.50
250hz=1.00
500hz=1.00
1.0k=1.00
2.0k=1.00
4.0k=1.00

There is more info here in pdf downloads if required
http://www.thermafleece.com/product/the ... -ultrawool

[Soundman2020]

It looks like it should work reasonably well.

- Stuart -