I’ve been thinking about (procrastinating on) how to incorporate acoustic treatments into the room. I’ve gone through a couple of design iterations, however, after building the riser and really thinking about what I want the room to become I decided to go with a simpler look. I’ve since decided to go with a grid pattern that will cover about 50% of the side walls consisting of a 20x17, 20x30, 20x17 panel stack on top of each other.
The thought is to build “cases” for OC703 and then build separate frames similar to speaker grills that will cover the cases. I want to do this because I plan on covering the 20x30 frames with printed fabric posters and having the frames separate from the insulation case allows me to switch out the poster as I want to or for seasonality, etc.
Here is a look at the completed cases filled with 0C703. The first reflection areas which are the center and bottom 4 cases are filled with 2” of 703 no air gap, the rest of the cases are filled with 1” 703 and 5/8” air gap. This has greatly improved RT60 / ETC measurements outside of that the experience is much improved, dialog seems much clearer and I feel I can localize sounds much better from left, to center, to right speakers.
For those who are interested in the build process, here it is:
4x8’ sheet of half inch ply wood cut into 1-1/8” strips
Side pieces cut to 64” and cross pieces cut to 19”
Assembled with glue and staples
A stack of them ready to go
I built 4 (2 for each wall) smaller ones measuring 4” across to act as “end caps” visually
To keep the frames square, I stapled on an angled piece at the bottom corner of each frame.
To hang them on the wall I used a French cleat.
To maintain an air gap I stapled jute to the back edge (I later cut out the jute for the center 4 and bottom center 4 to accommodate 2” of 703).
I also sprayed the edge’s black just in case the grills done line up perfectly.
Next is to build grills to cover all of the 20x30 and 20x17 cases. Here’s a sneak peek for a test frame that I built using the printed fabric: