is this good stuff?

  • Thread starter Thread starter elicantu
  • Start date Start date
I would think it would be comparable. Ive looked at this stuff before. But for 25 more you can gewt a case of owens. Might do some more research. Google search the rockboard.
 
I just got some panels from atsacoustics last week or so.

website said:
This is 24 x 48 x 2 inch Rockboard 60 manufactured by Roxul. It is rigid mineral wool board similar to Owens Corning 705 at a density of 6 pounds per cubic foot.

Rockboard is rigid but not very strong, similar to styrofoam in strength.

Rockboard 60 is a great option for acoustic projects that require a rigid material.

If you need 6 or more pieces, order in full cases here: Roxul Rockboard 60 Case of 6.
Click to expand...

I saw some absorption coefficient graphs on some of the other products, but not on this one. Send them an e-mail and ask before buying. But the Owens stuff is pretty affordable if you go the DIY route and just buy the insulation and make your own frames.

I'm lazy and just ordered the pre-built panels. :) Plus I don't think I could have made them look as nice.
 
How about this stuff:
50578945.JPG

It's called "compressed soft wood fiber" or something. It's very soft - you can easily leave a deep mark with your fingernail. It does seem to be very effective at absorbing high frequencies, not sure about the rest. Maybe stacking them would result in a reasonably efficient iso panel? They're dirt cheap, less than 1$ for m^2
 
Um - I'd pass on the wood fiber. The air flow resistivity is going to be horrible.

Stick with known quantities (fiberglass, mineral wool, acoustical cotton).

Bryan
 
...

That graph gives no thickness specifics, or approx. freqs...

How does something absorb more than 100% ?!?
 
over 100 years ago when Sabin first documented absorption coefficients, he was able to prove that absorption could exceed 1.0. this is primarily due to "edge effects" where the exposed edges of the absorber allow it to exceed 1.0. one of the reasons that porous absorbers with exposed edges can be advantageous in many cases...

the rockwool 6pcf should be fine for bass trapping but as pointed out, compare it with other product coefficients to determine if its right for the application you intend.
 
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