Acoustical Treatments Master Thread - Page 382 - AVS Forum | Home Theater Discussions And Reviews
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post #11431 of 11436 Old 07-27-2016, 04:58 AM
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Originally Posted by Tom Riddle View Post
No, they are 20' high, and my wife is barely on board with putting traps in the front. I got a hold of GIK and ATS, and they both suggested I just stick to bass traps behind the towers and the center due to my constraints. My room is not an ideal space due to being so open, so I will go with any improvement until I can build a dedicated space.
Yes that is a lot of blank wall area so you will naturally have a lot of upper frequency reflections (reverb). In the future, I would get some absorption (or diffusion) on the upper wall areas.

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post #11432 of 11436 Old 07-27-2016, 11:22 AM
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Thanks @myfipie . Unfortunately, those areas have been deemed off-limits by my wife. I do have two bass trap panels coming in from GIK, so we will see how that helps. I did have a contractor come in to see about finishing the upstairs media room - so I'm on the way at least. My wife is trying to steer me from adding a pool and just finishing that room. That's how tired she is of my HT hobby, lol.

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post #11433 of 11436 Old 07-28-2016, 08:03 AM
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Hey guys.
Are tuned membrane traps very effective for treating SBIR? I have a huge notch in response at 135 Hz which I believe is SBIR and would try to treat it by putting membrane trap at right location. Broadband panels don't help much.

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post #11434 of 11436 Old 07-28-2016, 11:04 PM
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Are tuned membrane traps very effective for treating SBIR? I have a huge notch in response at 135 Hz which I believe is SBIR and would try to treat it by putting membrane trap at right location. Broadband panels don't help much.
Is it a side wall or ceiling bounce issue? A diagram or picture might help to confirm. But aside from that, it might more effective to diffuse the reflection. Just a thought.

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post #11435 of 11436 Old Yesterday, 05:42 AM
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Quote:
Originally Posted by Roger Dressler View Post
Is it a side wall or ceiling bounce issue? A diagram or picture might help to confirm. But aside from that, it might more effective to diffuse the reflection. Just a thought.
My left speaker is very close to the side wall and also right below slanted ceiling. That (slanted ceiling mostly, I believe) causes pretty chaotic response from 120 to 700 Hz (unlike on right speaker), but my movement options are pretty much non-existent.
I have early reflections treated, but my room configuration makes it kinda difficult for me to figure out the solution. Today I will try to play sine wave at offending frequency while measuring SPL at MLP and move acoustic panels around to see if anything will make a difference.

Also, how do you diffuse 135 Hz?

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post #11436 of 11436 Unread Today, 02:35 PM
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Got my panels in from GIK today - put them in temporary spots just to test, but will take measurements and move to the best spot later. I used TDKR as my demo, and I noticed a significant improvement right away. The bass is much more potent, with little reverb off the front wall, and all the rattles that were in the equipment rack are gone. Very nice! My wife hates them though - she is ready to call the contractor today and start on my HT room, lol. The contractor is coming back by on Tuesday with his structural guy to finish out my quote.

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