VO-BB - 20 YEARS OLD!

Ed Gambill · Posted: Sat May 24, 2008 9:03 pm Post subject:

Try this dealer. I have called the local store and they told me they are dealers for 703 panels. I got lucky and found 4 bundles at a local salvage store. 1 1/2 is probably the thickness to start with.

Bridgeport, CT (Insulation)
160 Avon Street
Stratford, Connecticut 06615
203-375-6650
203-375-5071 FAX
888-894-6333
bridgeport@spi-co.com http://www.spi-co.com/index.html

If you need details on mounting let me know I have some source material that I can share with you.
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Deirdre · Posted: Sun May 25, 2008 7:08 am Post subject:

Thank you all for this fabulous input, and Ed—I'm grateful for the help.

Edo:

here's the spec sheet on the stuff I can get down the street:

Dow Tuff-R.
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Edo · Guest

Geardre,

As far as I can see now, there are no specifics for absorption at specific frequencies, so I'd have to conclude (visited the website as well and nothing there either) that it has not been tested under those circumstances. Or... if we want to play devil's advocate, "publishing the measured specs for sound absorption would not be a valuable marketing strategy". Furthermore, their "R-value", is not related to what the insulation material industry holds as a norm or standard.

I would not touch it Deebs... unless you feel chilly in your room Laugh

Jowillie · Posted: Sun May 25, 2008 8:19 am Post subject:

From the "Funny you should ask" department.

Proof that I'm no expert--but a Master of BS.

Question about Sound Panels
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Deirdre · Posted: Sun May 25, 2008 10:24 am Post subject:

The R value for the 2" Tuff-R stuff is 14.

Isn't compressed fiberglass compressed fiberglass?
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Edo · Guest

It's not a case of whether it's compressed, but how rigid it is. No doubt will it absorb some of the sound, but comparing it to OC 703, OC 705 just can't be done without the proper measurements. Since they don't put them in their specs, I think they just don't have those data available, hence my thought they have probably not spent the mere fortune involved when thoroughly testing the stuff for acoustic use.

And "R-14" in itself says nothing. I've heard of R-11, R-13 and R-19, but R-14 (if at all in the same scale here) is new to me. It is foremost a relative figure depending on all sorts of data, but you require knowledge of the testing circumstances, which again, are not provided. Who knows, maybe it works like a charm! Just can't tell from the provided info. I passed the specsheet through to an acoustical engineer I know, see what he comes up with.

Deirdre · Posted: Sun May 25, 2008 4:24 pm Post subject:

Thanks, Speedo Edo.

I appreciate your help!
I don't know anyone nearby who has a recording studio, for heaven's sake.
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Edo · Guest

Geardre,

I've been thinking about your room's measurements for a bit more. Since your room is 7' x 9.5' x 7' I'd be a bit careful when trying to absorb too much of the sound. Are the walls spot-on parallel? Or is the room not totally square shaped? Please draw me a layout of your room, including your position and where your microphone is located. Also draw where cabinets, desk and other stuff is. You might have a solution lying around there all the time, and it merely means moving some stuff around. Also state if there are any windows and where. Please try to keep it to scale if possible. Don't forget to tell me if your walls are painted or untreated and what sort of material they are made of... is it wood, concrete, drywall/gypsum board or some other stuff; that sort of things. The dimensions make it more of a vocal booth than a control room. Do you use monitor speakers to listen back to what you've recorded or is it all done on headphones?

Dang... if I were anywhere near you, I'd probably fix that room in less than three hours, but since we're on "long distance dedication" here, help me think of something! And something good! Thing is, I'd very much like to try and find a way to ultimately improve the circumstances before going DIY and start fixing problems that could have maybe be avoided in the first place. Hence all my questions. Laugh

asnively · Posted: Sun May 25, 2008 5:40 pm Post subject:

Here in LA, even some very pro set-ups, including TV sound stages and stuff, reportedly use rigid fiberglass board with specs similar to 703's, but not Corning brand. Mine's not 703, and it works great.

I think it would be fun to fly Edo (and the cat) out to get it sorted.
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Ed Gambill · Posted: Sun May 25, 2008 7:12 pm Post subject:

Here is the problem with this material from Dow "closed-cell polyisocyanurate
foam core sandwiched between a choice of durable, exterior facers"

It will make a good reflector regarding sound waves.

The folks who own the RockWool name have a product that is like 703 and Johm Mansfield Company also has a 703 type.

Then again you could consider Quadratic Diffusor. They are maid from wood. I know a guy who has the plans for them.

Abflectors are a good way to go also.
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Jowillie · Posted: Mon May 26, 2008 6:24 am Post subject:

Good stuff, Ed. Thanks.

Remember if you choose something like some Rockwool or the cotton (denim) insulation, it will need support to stand on its own. A simple box frame would hold it up. ($$)
Here's a DIY room evaluator: Acoustics Analysis.

Like Edo says, you must factor in furniture and fixtures.
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