Acoustical Treatments Master Thread - Page 355 - AVS | Home Theater Discussions And Reviews
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post #10621 of 10625 Old 01-26-2015, 09:39 AM
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Originally Posted by myfipie View Post
Symmetry is most important from where you sit forward. If you have windows in one of those corners then use something that can free standing and stacked. Something along these lines.
http://www.gikacoustics.com/product/...fit-bass-trap/
For symmetry the best I can do is 1m worth of soffit traps or super chunks in all four corners but that is only 40% of the wall height covered. No idea how much effect that would have on the sound. Due to WAF I can forget about having traps blocking the windows. Padded curtains made from say duvets are ok though but would that be remotely similar to the soffit traps?

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post #10622 of 10625 Old 01-26-2015, 03:39 PM
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Originally Posted by granroth View Post
I recommend watching the Acoustics 101 and Acoustics 102 videos from Home Theater Geeks 177 and 178 with . They are absolutely the best intro to acoustics I've heard and, notably, they cover things like coverage levels very clearly.

http://twit.tv/show/home-theater-geeks/177
http://twit.tv/show/home-theater-geeks/178

(also available on YouTube)
Hadn't seen those before - thanks for sharing the links. Interesting absorb/diffuse pattern approach...

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post #10623 of 10625 Old Yesterday, 07:16 PM
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Soffit as partial bass trap

Let's say I'm building a soffit that wraps around my entire theater and mostly exists as a chase for HVAC ducts and wiring. In fact, the entirety of both sides and 3/4 of the back of the soffit are monopolized by the ductwork. That does leave a roughly 13' x 4' x 10" section of soffit above the stage that will have nothing practical in it.

So I'm thinking I can do double duty on that part and turn it into a bass trap by stuffing it with insulation. The question is "how"?

The soffit will be built with dual layers comprised of 5/8" OSB + 5/8" Drywall (since most of it is to hide possibly noise HVAC). I'm assuming that that will also effectively reduce the "bass trap" ability of the soffit to unmeasurable levels.

If that's true, then that implies that I will need a hole in my soffit? Maybe covered with fabric?

If so, then how big should said hole be, to be an effective bass trap?

Just pink fluffy stuffing, or would it really help to use rigid fiberglass?
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post #10624 of 10625 Old Today, 07:36 AM
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I would not use holes, but cover it with fabric, keeping it open on all sides facing the room. And yes use normal fluffy fiberglass.

Glenn Kuras
GIK Acoustics

http://www.gikacoustics.com

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post #10625 of 10625 Unread Today, 04:29 PM
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Quote:
Originally Posted by myfipie View Post
I would not use holes, but cover it with fabric, keeping it open on all sides facing the room. And yes use normal fluffy fiberglass.
So this is roughly what it'll look like (minus the light tray):



The grey part is entirely taken up by ductwork (in fact, 3/4 of it is the duct) so only the green part is available to be a bass trap.

Are you suggesting to essentially have no bottom and no side to the green part of the soffit (other than the frame) and to install just have fabric covering the frame and fiberglass?
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