The OP referred to "stuffing", but others, namely me, referred to "damping".
Damping: a reduction in the amplitude of an oscillation as a result of energy being drained from the system to overcome frictional or other resistive forces.
Most of the acoustic foams tend to be centered around 5khz, at least the stuff made for hvac applications. Which is perfect for full range speakers.
Is surprising how much most of it is just reflective, not functional for our use in helping to kill the back wave.
Most of the acoustic foams tend to be centered around 5khz, at least the stuff made for hvac applications. Which is perfectfor full range speakers.
Is surprising, and disappointing how much most of it is just reflective, not functional for our use.
None taken by this party. Ego has no place and no ideas are bad ideas. Even if they might seem like it, there capable of spawning new and different ideas from a different perspective and angles.
All postings welcome. Heck I don't even mind when ppl go off topic. I took as as part of the sites style, I mean they don't take it too seriously the few times it happens. But nor do they blast you or ignore you for slipping ot. Besides it happens by members I consider valuable to the forums. I'm always light hearted, if something seemed out of sorts it was not intentional. But I have been blasted for it a couple times. I don't single anyone out for things life is too short.
All postings welcome. Heck I don't even mind when ppl go off topic. I took as as part of the sites style, I mean they don't take it too seriously the few times it happens. But nor do they blast you or ignore you for slipping ot. Besides it happens by members I consider valuable to the forums. I'm always light hearted, if something seemed out of sorts it was not intentional. But I have been blasted for it a couple times. I don't single anyone out for things life is too short.
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Some 1" foam at the front would let the corners be crisp. Ideally the back could better use more integrity to help keep the material taught, I want to say taughter it would be more apropriate if using rockwool thats so easy to compress if you stretch on it a lot.
Perhaps I'll just two and be done with it. After I get on a real 2x4 or maybe 2x6 inch panel of some kind, similar but still very different. That I'm hoping will tackle a bit of both for reverse wall.
Is there such a thing as non acoustically transparent spongy foam? While at the same time not being a styrofoam. I am pretty sure they CNC some densities of styro for diffusors.
Perhaps I'll just two and be done with it. After I get on a real 2x4 or maybe 2x6 inch panel of some kind, similar but still very different. That I'm hoping will tackle a bit of both for reverse wall.
Is there such a thing as non acoustically transparent spongy foam? While at the same time not being a styrofoam. I am pretty sure they CNC some densities of styro for diffusors.
This is what I don't like hearing. Foam almost became a possible solution. That would make it problematic because that's exactly how I want these in particular to function, to deal with back wave.
I have another, simpler idea, take them to the nearest upolstery shop...😉.
There is nothing wrong with subtle or bold grains in the woodwork showing is there? I mean the speakers get trimmed out nice, would that be to much and right behind? Hence why I also thought white, my speakers have black ash wood veneer. If I go dark they will bury the speakers, and ppl will bump off of them even more.
I need to hex the bases one of these days.
I’ve used this a couple times on the back (inside) of the speaker box, works well taming down to 200hz +/- backwave.
Uses a little box volume (6lb/Cu ft)……anyone know a way to figure out percent of air volume displaced?
https://www.acoustimac.com/roxul-rb...HM7zhHWzrC5C8MZImlXzZ-Pb2rzkyuPsaAm5tEALw_wcB
Uses a little box volume (6lb/Cu ft)……anyone know a way to figure out percent of air volume displaced?
https://www.acoustimac.com/roxul-rb...HM7zhHWzrC5C8MZImlXzZ-Pb2rzkyuPsaAm5tEALw_wcB
Good for reducing cabinet reflections, but could that magnitude of density also go some way towards reducing the available internal volume?
I'd be interested in an expert opinion.
Yes it would have to be factored into the design, my guess is its at least a 30% reduction by volume…….so for example (at that guesstimate)……
2”x12”x24” = .21 cu ft +/- ……but the question still stands on how to figure it out exactly from 6lbs/cu ft?
2”x12”x24” = .21 cu ft +/- ……but the question still stands on how to figure it out exactly from 6lbs/cu ft?
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Is there any performance difference between recycled denim or cotton wool (considering they're both cotton) ? - it's just that I find cotton wool much easier to get, especially in small amounts.
Denim and Cotton are essentially the same product! Not to be worn except in a dry summer. Thing is, Cotton absorbs dampness. Thus feels cold when humidity increases.
My advice to you is to line your room with better damping materials, and Wool ticks most of the boxes:
You could do Worse than employ Rockwool:
Bit of Steen Duelund here.
I say this as a talented Mathematician who understands damping:
1-2 buckle my Shoe. An easy task for a mathematician even at a young age.
Best Regards from Steve in Southsea, UK.
My advice to you is to line your room with better damping materials, and Wool ticks most of the boxes:
You could do Worse than employ Rockwool:
Bit of Steen Duelund here.
I say this as a talented Mathematician who understands damping:
1-2 buckle my Shoe. An easy task for a mathematician even at a young age.
Best Regards from Steve in Southsea, UK.
Steve only claims to be "Quite good at Maths".
He can count up to twenty, but then his plate's empty! 😍
Try asking him about Physics or Telecommunications Engineering - his main specialities!
He can count up to twenty, but then his plate's empty! 😍
Try asking him about Physics or Telecommunications Engineering - his main specialities!
That may not be possible, but we can assume that material which is too tight and dense will simply reflect rather than absorb.
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Well the foams that are made for acoustical purposes are quite good at doing what you’re describing, however the commonly available materials from craft stores are likely to be more reflective.
Should have made that more clear in my last post…
Appreciate you help phase.
Fabricland sells acoustically transparent black speaker material, the real deal. If anyone can use some. Ill check elsewhere for foam.
I already started a 2x6 foot × 6 inch frame with laminated notty pine. A castle pattern MDF template will simplify notch outs to flush set 1/4" slats. Ill plan as I go for the rest.
Fabricland sells acoustically transparent black speaker material, the real deal. If anyone can use some. Ill check elsewhere for foam.
I already started a 2x6 foot × 6 inch frame with laminated notty pine. A castle pattern MDF template will simplify notch outs to flush set 1/4" slats. Ill plan as I go for the rest.
This stuff is made for sound absorbing, NRC numbers over 1.0 means 100% absorption @ that frequency.
As for room acoustic panels, these are rigid enough to just wrap in cloth and hang on the wall without a frame.
