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Old 10-11-2016, 12:36 PM
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Originally Posted by sdurani View Post
If you're now claiming that those graphs aren't showing physics, then can you post measurements that support your earlier claim that "spacing makes it absorb lower frequencies ... is only true if you use the SAME thickness of a panel"? Any evidence to show that the air gap must be the same as panel thickness in order to absorb lower frequencies? What is the right density to make that happen?
Ahhh, I will just stop now.
It's not easy when English not my native language.
Never claimed it would not work if the spacings not the same - just said that that's where it's most effective.
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Old 10-12-2016, 09:13 PM
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I already have raised channel on my ceiling with insulation above but I'm not happy with the noise isolation from the upstairs adjacent space. Mostly noticing "vibration" type of intrusion from footsteps, doors, etc. Not a lot but I want to try and correct. If I do stretched fabric panels on the ceiling with absorbtive material beind it, will it help or am I just wasting money? What would be the best material or specific product to deaden these outside sounds (but then am I created a new problem of my room being too absorbtive)?
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Old 10-15-2016, 05:54 PM
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I ordered bass traps that are considered heresy by acoustic treatment buffs but I had bo choice as my room is small and my budget is low, even if I had $10k for panels I simply couldn't fit the like of realtraps or diy panels in.

The panels say they are effective down to 70hZ and they are cut off at an angle at the back for an air gap.

They are foam bass traps but are 53cm across the face and along each wall.

I know foam isn't the best solution but it's not like I bought that terrible 1ftx1ftx1ft corner sections that you can buy 40 pieces of for like $50. I paid $830 for enough for the 4 vertical corners and am going to add 60cmx60cm 3 inch thick foam panels to the roof, rear wall, front wall behind the front speakers and to the side of the centre speaker before finally getting 3 more bass traps for the front and rear wall/roof corners.
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Old Today, 07:55 PM
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6, standard 2' x 4',pack of 2" 703 for much less, say $20-25+ , depending on shipping zip code, (my purchase -$89)

slightly more attractive price, <$2 per square ft. than going thru amazon and Acoutic-whatever that name is.

will update when I get it

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