Suspended ceiling

Posted: Mon Jan 26, 2004 10:40 pm

My small room has an 8' ceiling with a dropped fiberglass panel ceiling at 7'7". I am intending to put a 1 1/2" 705 equivelent with paper backing in place of the original thin fiberglass panels(3 1/2" space between the ceiling and fiberglass panels). Paperside down around the wall edge(thinking this would be better for absorbing mid lower frequencies) fiber side down in the center(covered with cloth to absorb high mids and high frequencies). I have built several panel traps for lows but have run out of wall space except for some areas reserved for high absorbers. The question is should I bother with some of the panels flipped along the outer edge or just put them all fiber side down.

Posted: Mon Jan 26, 2004 11:15 pm

Hey,

I can't help, but I see you are in Texas. Where did you find your OC 705? I'm looking for 2" 703, about 50 sheets (2'x4' non faced). I'm in Houston, BTW...

Thanks for any info!

Later Cool

Posted: Tue Jan 27, 2004 9:59 am

What I found was CertainTeed brand and found it in 1 1/2 W/paper backing with specs similar to 705 at a local commerial insulation company. Don't bother with the companies that do houses they won't have it look specificaly for industrial and commercial insulation companies. That will narrow your search a little. This is a link to their dealer locator web page. There are two or three in Houston. http://www.certainteed.com/alocator/lwp0001.html
The 3m was impossible to find in my area(6 hours south of you).
btw.Ethan sells 2" 705 on the realtraps website and the price seems good compaired to what I am paying.

Posted: Thu Jan 29, 2004 4:30 pm

Is everyone on vacation??? Sad

Posted: Thu Jan 29, 2004 5:58 pm

Kent,

I like your idea. Putting the foil side down on some of the panels will prevent you from overdeadening the hi end.

Any way you could be convinced to lower the drop ceiling 2-4 more inches?

--Wes

Posted: Thu Jan 29, 2004 9:00 pm

I could do that. I'm going to have to take all the existing panels down to put up the thicker stuff. How will that help me? Breif explanation please.

Posted: Thu Jan 29, 2004 9:06 pm

Thanks!

Posted: Thu Jan 29, 2004 9:36 pm

Quote:

How will that help me?

The additional air gap improves low frequency absorption.

Posted: Fri Jan 30, 2004 3:58 am

I completely scrambled the original message (losing oversight in this small window) so restored it.

Jaakko,

I get the feeling that you use a suspended ceiling metal metal profile system, is it?

You can use almost anything to substitute the foil.

You can combine absorbing tiles with reflective tiles (even light triplex panels or whatever)

I think you also have access to Ecophon (Swedish) acoustic materials isn't it?

They have ceiling tiles who look exactly similar with different degrees of absorption towards the mid and high frequencies.
As such you can play with it, even without it being visible.

For anyone:
Ecophon is Swedish, but belongs to Saint-Gobain a goup with over thousand companies (including Isover) and over 150000 employees all over the world.

Ecophon is easy accessible in Europe but also present in US.

Their absorption material (glass fiber tiles and wall panels) are available in several options.
What I'm referring to now are the tiles which are painted.
This is a deviating technique from traditional tiles covered with all kinds of textile and fabrics.

Tey have them with 1, 2 and 3 coatings of paint.
This was originally designed in function of hygienic properties (they are certified for use in cliniques/hospitals).

Only recently they discovered that what they earlier saw as a disadvantage (tradeoff between absorption and hygienic properties) now see as an advantage in function of room acoustics.

It is worth looking at.
However Ecophon materials aren't that cheap.

Here I used them between the outside windows.
I used them as combined membrane damper specific for their controlled diminishing high mid and high frequency absorption.

http://www.galaxystudios.com/galhal.htm

Note that this room is almost 8 m = 26 feet high.
This are the wall panels (physically identical as ceiling tiles of 2"). They look exactly as delivered (I did not paint them or covered them with any fabric)

Best regards
Eric

Note: I have NO commercial binding with NO company or supplier whatsoever.

<small>[ January 30, 2004, 05:46 AM: Message edited by: Eric Desart ]</small>

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