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Discussion Starter #1
Hi guys,
I am wanting to build some acoustic panels for my living room HT. We really don't have a lot of options here in Oz. Rigid fiberglass and Rockwool is pretty much impossible to find, and the densest insulation material I could find locally is only 11kg/m3. Pretty well useless.

The only type of dense material I could find is here:
http://www.ebay.com.au/itm/Fiberglass-Panel-for-Acoustic-Treatment-Sand-Colour-Fibreglass-600x600mm-/111380249973?pt=AU_Pro_Audio&hash=item19eec7bd75&_uhb=1

Is this any good for use as an acoustic panel? I would build a frame for it, and have a 50mm air gap between it and the wall, and cover it in suede or a similar material.

Is there any other possible alternative materials for use in acoustic panels?

I was also thinking that maybe I could use diffusion instead of absorption? Thoughts?
 

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Discussion Starter #2 (Edited)
Quick pic of my setup with updated furniture but without the AT projector screen set up. (I stand the center speaker on end for AT screen use)



Old pic with old furniture looking towards the MLP. Position and walls the same. (Gotta do something with that power lead!)


Old pic with old furniture looking towards the Dining area.
 

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Looks like a typical OC705 core, resin hardened edges and wrapped with fabric. It will do fine though for any kind of lower mid and bass control, you'll need to use them at least 4 pcs thick.
 

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Discussion Starter #4
Excellent. Thanks Bryan. Although on second thoughts, a 1200x600mm panel could cost $200 in the end with that stuff. Kind of defeating the purpose of DIY in the end I think.

I came across this from Tontine 'Acoustisorb 3'. http://buybuildingsupplies.com.au/50mm-tontine-acoustisorb-batts-2400x1200mm-pack-p-28501.html I could double up the batts to make it 100mm thick + an air gap behind.

Here is the data sheet: https://docs.google.com/viewer?url=http://www.tontineinsulation.com.au/images/docs/Tont_Acoustisorb_3_Version%2010s.pdf
 

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Not all that great in the low end even at 100mm but if that's what you can get, guess it'll have to do.
 

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Excellent. Thanks Bryan. Although on second thoughts, a 1200x600mm panel could cost $200 in the end with that stuff. Kind of defeating the purpose of DIY in the end I think.

I came across this from Tontine 'Acoustisorb 3'. http://buybuildingsupplies.com.au/50mm-tontine-acoustisorb-batts-2400x1200mm-pack-p-28501.html I could double up the batts to make it 100mm thick + an air gap behind.

Here is the data sheet: https://docs.google.com/viewer?url=http://www.tontineinsulation.com.au/images/docs/Tont_Acoustisorb_3_Version%2010s.pdf
A few of us down here are using this stuff.
http://www.acoustica.com.au/hdbatts.html
 

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The Tontine 3 looks to do a better job and have a more suitable density for more broadband applications.
 

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