Originally Posted by Nick****achi
What is going to be behind the slats?
If you do broadband absorption behind the slats the "diffuser" will "work" on lower frequencies. The difffusion frequency lower limit is dictated by the size of the diffusing element, which in your case looks like +/- 6" which is close to ~1000-2000Hz. That diffusion is practically transparent to frequencies below that.
AFA the sizes you used and pattern, did you use any mathmatical deriviation? Arbitrary diffusion will not evenly diffuse the sound and probably will introduce some comb filtering.
How far is the diffuser to the LP? Diffusion needs distance to "work." At least 6' from what I've read.
Having said that, IMO for the back wall, imperfect diffusion is better than a bare flat wall, but maybe not quite as good as a traditional broadband absorber. A confirmed diffusion design like a QRD with adequate spacing would be ideal though.
is a good resource to help calculate how to construct a QRD if your interested.
Originally Posted by HopefulFred
I didn't notice your rear wall treatment earlier. Apart from what Nick said, which seems to be pointing in the right direction, it would be more effective to diffuse with vertical elements. Horizontal slats like this will redirect sound into the floor and ceiling. This thread
follows someone on a similar path, and I think leads to useful conclusions for you.
Hey guys, thanks for the help.
Like I said.. just winging it at this point. I knew somebody would point me towards how to actually do it effectively, even if it was possible.
Depth is about 6", and the distance to the money seat is ~6 feet; further to the front row. Bottom half is solid as shown. Original thoughts for top half was 3-1/2" safe'n'sound spaced off the wall. Other thoughts were 5-1/2" deep pink fluffy.
I have seen poly over pink fluffy on the back wall, or 703 with the FSK on the outside. Since I need to make up the 1/2" on the top half, I was tossing the completely random and uneducated thought of the strips out for some feedback.
I did see the QRDude software, but it also indicates well depth. Since I'm not going to be dealing with well depth, is there a way to use the program to determine slat width and spacing? Is it even worth attempting? It is a bit of work, I don't want to expend the time and energy for something that really won't produce much benefit over 6mil poly. If I had to do it vertically it would be substantially more work and I fear not worth the effort.
I'll read those links tonight, thanks again.