diy absorption
diy absorption
How effective is compressed insulation as an absorber? I'm thinking of making some 5" deep plywood frames with a backstop @ 2.5". Cloth wrapped tight across the face, then filled with unfaced R30. I seem to remember reading somewhere that a pegboard backstop increases bass absorption, or perhaps just use cloth there as well. How would an assembly like this compare to standard treatment?
This would be for a short term space I'm setting up, looking for economical solutions.
This would be for a short term space I'm setting up, looking for economical solutions.
Village Idiot.
This will work ok, though probably not as well as 703 or 705.
Also, I would not use a backstop of pegboard or any kind of wood. This will reduce airflow through the trap which will reduce its effectiveness. You want as little of the insulation to be covered up (except with acoustically transparent cloth) as possible, including on the sides. This is why we mill holes in the sides of the metal frames on our traps. It increases the surface area, and therefore the effectiveness, of the trap.
Also, I would not use a backstop of pegboard or any kind of wood. This will reduce airflow through the trap which will reduce its effectiveness. You want as little of the insulation to be covered up (except with acoustically transparent cloth) as possible, including on the sides. This is why we mill holes in the sides of the metal frames on our traps. It increases the surface area, and therefore the effectiveness, of the trap.
I used roxul 80 in my space, and am satisfied. The problem is that there's no place local that sells anything of this type, and shipping typically doubles the price. So Roxul for instance runs about $100 actual cost per bundle, plus framing and cloth. If a few $15 rolls of unfaced r30 can get me close enough for a temporary solution, I'd be happy.
The Bob Gold data doesn't directly touch on it, but seems to suggest thicker unfaced batts offer decent-ish performance. [/u]
The Bob Gold data doesn't directly touch on it, but seems to suggest thicker unfaced batts offer decent-ish performance. [/u]
Village Idiot.
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