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In Reply to: RE: Seeking advice on effective wall diffusion? posted by andyr on April 06, 2016 at 05:00:35
Love the built-ins, maybe tough to get to, but the records look great in that cubby slot.
I think 1" wide and 1" apart is too little to make any appreciable difference. Would you consider making something like what I have in my room? Make it out of material that the spouse is OK with, maybe even appreciates?
P.S. I would cut the back side at the wall angle so the protrusions are level with the floor.
Edits: 04/06/16Follow Ups:
Something like what you've done was another option I was thinking of - but it would be much more labour intensive.When you say " I think 1" wide and 1" apart is too little to make any appreciable difference. " - are you thinking that I meant just having 2x bamboo rods behind each speaker?
What I meant was ... an array of bamboo rods taking up the space between the panels, on the sloping wall. If they were 1" in diam and 1" apart, that would be about 37 poles (extending a total of 6' and going from the benchtop to the height of the panels - so about 4' long).
And what did you mean by " P.S. I would cut the back side at the wall angle so the protrusions are level with the floor. "? I can't picture it!
Regards,Andy
Edits: 04/06/16
Having the bamboo only protrude 1" or so into the room is not enough to do the job IMO, that was my intention.
If you built something like mine, I would cut the rear at an angle the same as the back wall so all pieces are "level", I can do a drawing if I'm still not making sense... I just think it would scatter better, and would look nicer as well.
I do think a 3D diffuser is better in your case with the sloped front wall. Just my opinion.
" 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
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).
What is a example of a 2D diffuser? Do you have any issues with feed back having your turntable on the F.W. close to the back of the speakers?
Example of 2D diffuser; mono-directional slats:
Never had any issues with my CDP there, which is long gong now. That's a pretty old picture...
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