Acoustical Treatments Master Thread - Page 102

If I was going this route, I'd experiment with some kind of a form to hold the edges while the resin hardened. As crisp as the commercial ones are, I'd bet they're using some kind of mold.

I"m sure they do use some type of mold. The but the resin is so tacky, that I would think any type of form would have to be teflon coated. But given the longer working time, I think it would be possible to get pretty good coverage and then sand the edges once it has hardened. Too bad I didn't find this stuff until I was completed with all my panels.

I'm thinking a "wax paper" lined mold.

We use a "teflon" tape at work all the time for curing epoxy samples. It works very well.

Is that like tape used by plumbers on threaded pipes? Wider, maybe?

No, it has adhesive on one side and is a clear brown in color. I honestly have no idea where you could even find it, but it is very useful.

Here are some new photos, with the panels mounted (well, the ones behind the couch aren't really mounted in their final spot, since they'll move to the side walls, and I'll place a couple of 244s behind the couch where you see these). I'm thinking they look pretty good

I want to make corner wall bass traps and I have OC 703 1" on order. Can I double the 1" up to make 2" in the corners does this help with Bass sound absorption? Or should I just order OC 705?

My understanding: 703 is fine, but you should use 4" straddling the corners.

so correct me if Im wrong....

1" OC 703 100% of the front wall.

1" OC 703 around the bottom of the side and rear walls, 4' high?

4" OC 703 in the corners

and maybe a couple 2x4 1" panels on the celing close to the front wall? My ceiling is drywall and will be painted. I will fabric the side walls. My floor will be carpet.


Also, my room is just a frame so I can maybe add more framing at 45 degree angles with 2x4s to each corner and then it would be easier to apply OC 703 to the corners??

FWIW McMaster-Carr seems to have a variety of such tapes.

I would like to cover my OC 703 (just purchased 12 2x4x1 sheets from ebay for $130 shipped) with Dazian Blackout satin coth (100% Polyester )

would this cause any problems?

http://www.dazian.com/cgi-bin/page.p...=119&cat_id=45

I know Dazian makes acoustically transparent fabrics, but I don't think this is one of them.

And, generally speaking, are man-made fibers more likely to reflect highs rather then pass them through to be absorbed by the panels?

I think people would agree that building "super chuncks" for bass traps in the corner is somewhat more effective than just placing full sheets diagonally across and leaving a free space cavity behind them. "Super chunk" is basically a stack of triangle shaped OC70x stacked up so that it's a solid corner. It's more work to get installed, but gives you more material for increased sound deadening.

So if I build triangle frames and fill them with OC703, I should get a decent bass traps. That is what Im thinking of doing. I will cut my OC703 to fill the triangle corner frames.


I was hoping it wouldnt effect the absorption too much. The GOM stuff so far hasnt passed the wifes approval.

What's wrong with GOM? I got their black and tan colors, and I'm very pleased with them. You can order samples and get a better feeling of the color. I got 8-9 samples and found two that were perfect.

You will not only get the best traps that a small amount of money can buy, you will get very close to the best traps that nearly any amount of money can buy.

http://www.atsacoustics.com/item--Ro...f-6--RB60.html

Is what I used for my bass traps, those sheets are 2" thick by 2'x4'. They measure very well compared to OC705 and are a good bit cheaper. And they stand up straight when leaned against a wall, unlike OC703. I use the Rockboard 60 in my studio as well. $60-$65 shipped for a box, +walmart fabric, +adhesive spray...hmmm, yummy. I did two 4" traps for the front corners on the floor going upwards and two 2" traps going from them towards my center speaker. Then I had some acoustic foam left over from a studio I worked in, and shoved them behind the 4" traps, probably doesn't help much, but if it gives a little more absorption all the better.

I have no problems with it, its the WAF thing and she wants some input if Im "stealing" the bonus room and making it a HT

are there different textures of GOM?

There are, but you should limit your choices to the acoustically transparent fabrics.

http://www.silentsource.com/acoustic...lorchart1.html

Man, there is so much reading and so many different opinions on this stuff.

I read that 100% polyester products allow substantially all the sound directed against the panel to pass into the glass fiber layers, the Dazian Blackout satin is 100% polyester


I also read that its not really acoustically transparent material we need for sound absorption but its material that does not reflect sound, as long as the material doesnt reflect much sound we are good.

I guess it comes down to how much reflection really happens because logically if the material is not acoustically transparent then it does reflect sound (atleast a little bit).

My freaking head hurts...Atleast I think I got a good deal for OC703 and I just ordered Roxul Rockboard 60 for the bass traps. Things are coming together, I just wish I could figure out the fabric.

btw, Thanks for the link Im going to order a sample of the Anchorage Style 2016 ONYX color

Yes, the problem is not that it doesn't pass frequencies, but that it might reflect them.

I did this up pretty fast in MS paint. What do you guys think? The panels would be typical 4' x 2' x 4" acoustic panels with black GOM. When the screens down they would be hidden behind it. I'm thinking about placing 1 foot tube traps in the corners next.

Don't forget you side, back, ceiling reflection points. With the screen down, you'll need some other absorption in the room.

Ya, I already have 2 at the primary front reflection points (you can barely see one on the left, they aren't mounted yet, one is leaning on top of my sub). I'm slowly adding the panels as I can afford them. 2 went in the sides, Ill get 3 to 5 on the front next. Then I'll throw some up on the rear and then a few more on the sides and figure out what to do on the ceiling. I'll throw some tube base traps in the corners and call it as good as it can get in the room after that I recon.

pepar, again thanks for the link. I sent an email to silent source for some samples and they are sending them too me now. Great customer service!!!

I bought a package of 2" Rockwool and just made four 3" thick 2x4 frames. I will cover them with the GOM fabric. Questions is: Should I put a single sheet inside each frame or squeeze two sheets in each frame? Or should I go out and buy a 3" Rockwool package instead?

Build 4" frames! Seriously, why did you do 3"...

I had that same comment in the reply window two times and decided against posting it.

Adding another inch to the depth might be possible. I might also load two sheets in and try to cover it with GOM so that the "proud" rockwool got rounded over into nice edges.

I did some more hard core measuring down there and came up with a new pattern. What do you guys think? Between the 2? Both give me space in the corner to put up tube bass traps. In the second picture, I threw in some sides that will go in also. To boot, when the screen is down, they will be hidden.






Or

(that panels actually slip behind the TV perfectly due to its mount)