Hello fellow acoustislutz,
I am going to be making a thread hopefully this next weekend depicting my results from my acoustic treatment in my bedroom studio. I will be taking multiple test measurements of the room, but I wish to address these issues before I go ahead and render my tests useless.
In my thread I will include pictures of my traps, sketchup renderings of my traps, sketchup files of my traps (with properly labeled components), pictures of my room, renderings of my room, and sketchup files for my room, and 10 set-up measurements done with REW - frequency response, waterfall, and the actual REW files, as well as the plain IR wav file for each measurement.
Four 4' x 15" x 15" soffits made of R30 (stacking two on top of each other for full floor-to-ceiling traps on my front wall-wall corners)
Five 24" x 48" x 4" thick + 3" airgap absorbers made from Johns Manville Linacoustic RC - noted as "wall traps"
Two 24" x 48" x 6" thick absorbers made from Roxul's infamous 2.5pcf mineral wool fire batts - used behind my monitors as "sbir traps"
This is a list of the measurements I will be taking:
- My room before Gearslutz - with no traps
- Orientation of things in the room after reading the acoustics section (current orientation) - with no traps
- w/ soffits
- w/ 'sbir' traps
- w/ wall traps
- w/ soffits & sbir traps
- w/ soffits & wall traps
- w/ sbir & wall traps
- w/ soffits, sbir, & wall traps
- w/ soffits, sbir, & wall traps, but speakers placed all the way against the front wall with the sbir traps placed elsewhere
I will be doing three tests per set up:
I will be showing the full 20-20k FR of each set up by using the L & R speaker average, at 1/24th octave resolution.
I will also show the waterfall at each set up, using the test that was driven by both speakers, no smoothing. Probably will show 30hz-300hz.
I have two Behringer ECM8000s at my disposal. Now, I have seen tests done with the mic in a tri-corner (usually, ceiling-wall-wall corner) - why is this done? Is this something I should employ while testing my room? I tried to find the answer but had no luck. If its possible in REW, I could measure with both mics at the same time - one in the 'sweet spot' and one in a tri-corner in my room.
Should I use the windscreen with the Behringer ECM8000?
Can I run a test with REW using two microphones at once, rendering different graphs?
How far down in level does a resonance have to be before the effect is negligible? Like, if all resonances are ~50db under the frequency response, how good is that?
Where else should I place the "sbir traps" for test #10? They were my first absorber and have 2x6s as the base and top, and 2x2 posts in the corners - they're heavy as hell, so I'm not going to try to wall mount them.
What other advice could you give me so that I can present this information clearly in a thread so we can derive the performance of the setups easier?
Lastly, is there any errors in testing this way, or is there anything I should take care while doing that could potentially render these tests useless?
Attached is a rendering of the room with all the treatment up, as it stands now.