Acoustical Treatments Master Thread - Page 392 - AVS Forum | Home Theater Discussions And Reviews
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post #11731 of 11755 Old 02-14-2017, 01:11 PM
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Originally Posted by 12B4A View Post
One thing you could try is modifying your absorption panels with BAD-style diffusers as exampled here: DIY Sound Diffusers

1/8" hardboard is ~$6 per 8'x4' sheet. Cutting the right holes in in might be a chore unless you know someone with a CNC machine for wood.
THats a thought! I like the design. I'll have to read up on those "bad" boys.

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post #11732 of 11755 Old 02-14-2017, 03:02 PM
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Or you could do something like GIK alpha panels which are absorption panels with wood slats in front of it that does the diffusion part. Make regular panels and get some 1/8 inch wood with vertical slats and glue to front of panel. But I recommend talking to GIK to see what they say about their advice on what you should do. Its free service and you don't have to actually purchase anything.

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post #11733 of 11755 Old 02-18-2017, 05:12 PM
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hi i have a small game/ theatre room i would like to treat since ive been reading on the importance of properly treated room. and since i have quite a bit of money invested i wanna do this before upgrading anymore. any way ill include a pic of my room and maybe i can get some suggestions are where to start. i have a umik coming in this week so i can started on rew. but just wanna get some ideas from you guys. for example i want to treat the ceilng and the walls were speakers are at maybe some bass traps for the corners. any help would be appreciated thanks.
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post #11734 of 11755 Old 02-19-2017, 10:14 AM
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Originally Posted by thecloneranger View Post
hi i have a small game/ theatre room i would like to treat since ive been reading on the importance of properly treated room. and since i have quite a bit of money invested i wanna do this before upgrading anymore. any way ill include a pic of my room and maybe i can get some suggestions are where to start. i have a umik coming in this week so i can started on rew. but just wanna get some ideas from you guys. for example i want to treat the ceilng and the walls were speakers are at maybe some bass traps for the corners. any help would be appreciated thanks.
With those 3 subs you will have alot of bass buildup in the corners so start with corner bass traps first. Floor to ceiling is optimal and do all corners if you can. This will absorb low frequencies that is bouncing around in the corners and then bounce back around in the room, the traps will absorb it so resulting in tighter, cleaner bass with improved decay. I see your wall art....are they acoustic panels? If not, you can get acoustic panels with same art work you have if you want to keep same theme in the room.

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post #11735 of 11755 Old 02-19-2017, 01:59 PM
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alright thanks for the advice. i will definetly start there

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post #11736 of 11755 Old 02-19-2017, 03:44 PM
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Treatments & Calibration Sanity Check Request

I was hoping someone could take a quick look at the following post, and let me know if I am doing anything silly.

The post contains pics of my treatments and a bunch of measurements.

Interior Room Dimensions:
Length: 21’ 9”
Width: 15’ 3”
Height: 8’ 10”

post link

thanks!
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post #11737 of 11755 Old 02-20-2017, 04:27 PM
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Quote:
Originally Posted by ereed View Post
With those 3 subs you will have alot of bass buildup in the corners so start with corner bass traps first. Floor to ceiling is optimal and do all corners if you can. This will absorb low frequencies that is bouncing around in the corners and then bounce back around in the room, the traps will absorb it so resulting in tighter, cleaner bass with improved decay. I see your wall art....are they acoustic panels? If not, you can get acoustic panels with same art work you have if you want to keep same theme in the room.
the art work is canvas shouldnt that be good acoustics or would it be better to have real acoustic panels?

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post #11738 of 11755 Old 02-22-2017, 07:52 PM
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I've got two questions. I'm looking to treat about 40-45% of the walls/ceilings and need to see how I should factor in these two features of my home theater.

1) I have a 6'X10'star ceiling going up. I made the ceiling with 1&1/2" insulated foam board and polyester fabric. Will this be a sound absorbing area?

2) I am planning to install two columns on the side walls and a majority of the rear wall out of faux rock. Can the faux rock be considered diffusion material, or will it act more like a solid surface?

I posted a couple of pictures for reference. This probably won't be the rock we will choose, but it will be something of this nature.
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post #11739 of 11755 Old 02-23-2017, 05:05 AM
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Everything could be said to be absorptive, reflective, and diffusive at some frequencies and to some extent; however, for your purposes the answers to both your questions are "no." For most audible frequencies, both of those surfaces should be considered reflective.
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post #11740 of 11755 Old 02-23-2017, 10:11 AM
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Everything could be said to be absorptive, reflective, and diffusive at some frequencies and to some extent; however, for your purposes the answers to both your questions are "no." For most audible frequencies, both of those surfaces should be considered reflective.
That's what I had figured, especially with the rock, but I was holding out some hope on the foam. I'm not sure yet how much ceiling treatment I want to do, so I plan to hit the walls first and take a listen to see if I need to continue with the treatments. Thanks for your input.
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post #11741 of 11755 Old 02-23-2017, 12:01 PM
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So I put some absorption on the ceiling and I must say it made some improvements! (I think), I don't know for sure because at the same time I added a couple more to the side walls, but wow the subwoofer is really rockin now!

Question, 2 of the 4'x2' panels I installed are on the wall just under the ceiling. Does this work like a make shift base trap between the side wall and the ceiling? It sure acts like it does because the sub has never sounded better.

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post #11742 of 11755 Old 02-23-2017, 03:32 PM
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Quote:
Originally Posted by thecloneranger View Post
the art work is canvas shouldnt that be good acoustics or would it be better to have real acoustic panels?
Real acoustic panels is better since it has acoustic material built in that absorbs frequencies and turns it into heat. If you want the same artwork on acoustic panels you can send pics to them and they will print artwork on fabric for you if you choose that route.

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post #11743 of 11755 Old 02-23-2017, 03:36 PM
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Originally Posted by drunkpenguin View Post
So I put some absorption on the ceiling and I must say it made some improvements! (I think), I don't know for sure because at the same time I added a couple more to the side walls, but wow the subwoofer is really rockin now!

Question, 2 of the 4'x2' panels I installed are on the wall just under the ceiling. Does this work like a make shift base trap between the side wall and the ceiling? It sure acts like it does because the sub has never sounded better.
Ceilings are one of the areas to treat to remove first reflection points so maybe it just sounds clearer and less muddy?

Not sure what you mean by having panels right under the ceiling on side wall, it should be ear level where you sit. If you are sitting at your MLP and did the mirror trick, the panel should cover that point and that includes side wall, ceiling, floor, etc.

If you want something that acts like bass trap, they need to be really thick and place in corners. There are also some people that use bass trap that look like panels that place between the ceiling and walls as well. But usually the corners are where you want to absorb bass frequency since it is where it tends to build up the most.

Maybe take some pics so we can see exactly what you are referring to.

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post #11744 of 11755 Old 02-23-2017, 03:39 PM
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GIK 244 on Ceiling

I am looking to hang some 244 bass traps on the ceiling, however I would like them to be flush. Has anyone had any experience hanging them flush and if so, what did you do?
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post #11745 of 11755 Old 02-23-2017, 03:44 PM
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Originally Posted by johnnymacIII View Post
I am looking to hang some 244 bass traps on the ceiling, however I would like them to be flush. Has anyone had any experience hanging them flush and if so, what did you do?
I believe GIK can send you cloud brackets or you can make your own. I don't think they are made to be completely flush unless you find a way to mount it without seeing hardware. If you don't mind seeing some hardware you can get flat brackets and mount it on panel and ceiling. Here is an example.
https://www.google.com/search?q=flat...Nul07BcYvgOrM:

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post #11746 of 11755 Unread 02-23-2017, 05:47 PM
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Quote:
Originally Posted by johnnymacIII View Post
I am looking to hang some 244 bass traps on the ceiling, however I would like them to be flush. Has anyone had any experience hanging them flush and if so, what did you do?
When you say flush, I assume you mean no space between the panel and ceiling. I used these z-bar clips on my 2'x4'x2" GIK panels and they worked great. Use one set of 4 per panel.
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post #11747 of 11755 Unread 02-23-2017, 06:26 PM
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Originally Posted by ereed View Post
Maybe take some pics so we can see exactly what you are referring to.

Long story short: I have base traps in the corners already. A few years ago I added 4x2 panels above my surrounds in the back of the theater because I needed an easy way to hide the speaker cables. When I did that the sub unexpectedly really came to life in the center of the front row where I normally sit.

Fast forward to now and I decided to put 2 more of these panels at my reflection point on the ceiling, while I was at it I put a couple more on the side walls in the front half of the theater purely for looks. Funny thing happened, the sub sounds even better at the listening position. I don't use rew, but multiple frequencies have improved big time, from the lower rumbles to the upper punch hitting base.

I also added some of those foam panels a bit lower for looks since they have little to no acoustic properties I'm told.

Anyways, it sounds really awesome and I appear to be breaking the normal rules here, but it's working. So I wonder if the upper panels are acting like mini base traps even though they don't straddle the corner like a traditional trap.
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post #11748 of 11755 Unread 02-23-2017, 09:32 PM
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Quote:
Originally Posted by drunkpenguin View Post
Long story short: I have base traps in the corners already. A few years ago I added 4x2 panels above my surrounds in the back of the theater because I needed an easy way to hide the speaker cables. When I did that the sub unexpectedly really came to life in the center of the front row where I normally sit.

Fast forward to now and I decided to put 2 more of these panels at my reflection point on the ceiling, while I was at it I put a couple more on the side walls in the front half of the theater purely for looks. Funny thing happened, the sub sounds even better at the listening position. I don't use rew, but multiple frequencies have improved big time, from the lower rumbles to the upper punch hitting base.

I also added some of those foam panels a bit lower for looks since they have little to no acoustic properties I'm told.

Anyways, it sounds really awesome and I appear to be breaking the normal rules here, but it's working. So I wonder if the upper panels are acting like mini base traps even though they don't straddle the corner like a traditional trap.
Nice theater! If it already sounds good then I wouldn't mess with it. I think your ceiling panels look great as it is....not sure if you want to go through the hassle to make it flush. Up to you, but I dig it like it is.

If if you want to replace foam down the road you can....you can go with diffuser/absorber combo in those places if you wish. Those will absorb more than foam would and also diffuse really high frequencies. So thats the only thing I would for sound improvement since you have a great looking theater as it is and I wouldn't change too much.

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post #11749 of 11755 Unread 02-23-2017, 10:35 PM
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Quote:
Originally Posted by thecloneranger View Post
hi i have a small game/ theatre room i would like to treat since ive been reading on the importance of properly treated room. and since i have quite a bit of money invested i wanna do this before upgrading anymore. any way ill include a pic of my room and maybe i can get some suggestions are where to start. i have a umik coming in this week so i can started on rew. but just wanna get some ideas from you guys. for example i want to treat the ceilng and the walls were speakers are at maybe some bass traps for the corners. any help would be appreciated thanks.
I love your game room. Where did you get the T2?

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post #11750 of 11755 Unread 02-23-2017, 11:01 PM
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I love your game room. Where did you get the T2?
thanks i bought it from sideshow collectibles a year ago.

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Quote:
Originally Posted by darrellh44 View Post
When you say flush, I assume you mean no space between the panel and ceiling. I used these z-bar clips on my 2'x4'x2" GIK panels and they worked great. Use one set of 4 per panel.
+1 for the Z-brackets. Many places other than acoustimac have them so one might be able to find them at a local store.

Quote:
Originally Posted by drunkpenguin View Post
Anyways, it sounds really awesome and I appear to be breaking the normal rules here, but it's working. So I wonder if the upper panels are acting like mini base traps even though they don't straddle the corner like a traditional trap.
They are absorbing some bass and in a good position for velocity-based absorption (porous) vs. the corners where pressure-based absorption (membrane, helmholtz) is more recommended. Without before and after measurements, it's not definitive to say that is what happened. They could be cleaning up a perceptible amount of ringing even if it may not be dramatic in the frequency response.

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post #11752 of 11755 Unread Yesterday, 07:53 AM
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When you say flush, I assume you mean no space between the panel and ceiling. I used these z-bar clips on my 2'x4'x2" GIK panels and they worked great. Use one set of 4 per panel.
Thanks for the recommendation. They look like the perfect solution!
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Thanks for the recommendation. They look like the perfect solution!
Glad I could help. I mounted my clips differently than shown in the image at the bottom of that link. I turned all of the clips 180deg on the vertical axis so the clips are hidden by the panels once they're installed.
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I asked a while ago in this thread about making some sort of DIY treatment to cover the TV in a hybrid 2 channel music / TV room.

This is my current system:



2 GIK 242 panels behind the KEF LS50's taking care of the first reflection points behind the front L/R speakers



2 GIK 242 Panels handling the first reflection points on the right wall off the front L/R speakers and 2 Tri Traps in the rear right corner



2 GIK Art Panels handling the first reflection points behind the MLP and a GIK Monster Bass Trap on an angle in the rear left corner behind the Mirage BPS 400 12" bipolar subwoofer



I currently don't have the left wall treated as the standard GIK panels don't fit in the positions that I need. I might need to order some custom sizes as there is a large window with a cellular shade and a corner where the room widens a bit and also a wall plug near one of the first reflection points and a small window with a cellular shade beside the speaker on the other first reflection point. I need to find a way to treat these areas, I think I'll pull out my trusty mirror and measure up the specific areas to have GIK build some custom sized 242 panels for me.

The room isn't perfect as there's an approximately 3-4 foot wide opening to the hallway beside the front right speaker. I will say though, that I've got this system sounding pretty great!!



(Bad cut/paste job) Would there be any significant sonic improvement from something like this covering the TV for dedicated music listening?

Theater: Vizio 70" P-Series 4K Display/KEF LS50 L+R/Mirage BPS 400 Sub/Anthem MRX-300/Blue Circle BC 24/Outlaw 2200/Rotel RB-1070/Oppo BDP-83/Sound Application CF-XE/GIK Acoustics Panels
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Quote:
Originally Posted by Nick V View Post
I asked a while ago in this thread about making some sort of DIY treatment to cover the TV in a hybrid 2 channel music / TV room.

This is my current system:



2 GIK 242 panels behind the KEF LS50's taking care of the first reflection points behind the front L/R speakers



2 GIK 242 Panels handling the first reflection points on the right wall off the front L/R speakers and 2 Tri Traps in the rear right corner



2 GIK Art Panels handling the first reflection points behind the MLP and a GIK Monster Bass Trap on an angle in the rear left corner behind the Mirage BPS 400 12" bipolar subwoofer



I currently don't have the left wall treated as the standard GIK panels don't fit in the positions that I need. I might need to order some custom sizes as there is a large window with a cellular shade and a corner where the room widens a bit and also a wall plug near one of the first reflection points and a small window with a cellular shade beside the speaker on the other first reflection point. I need to find a way to treat these areas, I think I'll pull out my trusty mirror and measure up the specific areas to have GIK build some custom sized 242 panels for me.

The room isn't perfect as there's an approximately 3-4 foot wide opening to the hallway beside the front right speaker. I will say though, that I've got this system sounding pretty great!!



(Bad cut/paste job) Would there be any significant sonic improvement from something like this covering the TV for dedicated music listening?
For the windows you can get some thick heavy curtains that will help. Or you can get those standing feet that goes with GIK panels that you can move around when not in use. Such as having it standing at the windows and then move them out of the way when not in use.

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