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In Reply to: RE: Yeah that's brilliant, Grant ... posted by grantv on April 06, 2016 at 19:00:21
"a 3D diffuser is better in your case with the sloped front wall".
But IYO, would having the bamboo rods, say, 3" away from the sloping FW give an acceptable result (compared to right against the wall)?
I think your 3D diffuser has merit - pertickly if the back is sloped to match the 17 deg wall-slope (so the front faces are vertical) - but it would be a lot more effort than a bamboo array.
Andy
Follow Ups:
Yes, that would make a lot of difference; leave enough space in between for the sound to get in there. I think layering them would be better, sort of like a bamboo lattice (which might look nicer also); upright in front, horizontal 1-2" behind, still with large openings between otherwise you remove the effectiveness of them being away from the wall.
So maybe 4-5" away from the wall; verticals. 1-2" behind them horizontals. And say 3" opening between.
(Right part is the end view)
Edits: 04/07/16
I'd design such a diffusor to a 'rule'. Regular spacing is your enemy.
Vary either the diameter OR the spacing of the elements. You can ALSO place the elements along a curve, like a French Curve or some other log shape. Regular spacing will be best at one frequency.
Perhaps a PHI shaped curve would work as well.
Too much is never enough
You could slope this to match front wall also. Either way, ensure whatever you do, that the first reflection point/span is what you base the size on, and where you hang the diffusor(s).
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