Does anyone know how this compares to other soundproofing techniques? - AVS Forum
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post #1 of 11 Old 11-05-2013, 01:35 PM - Thread Starter
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I found this on youtube and it looks like it might be a great product for my future HT...
https://www.youtube.com/watch?v=ZlAZsYp2M-U


Any comments?

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post #2 of 11 Old 11-05-2013, 02:33 PM
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Do a search here for "engineered drywall" and similar terms and you get a lot of hits. I'll let the experts weigh in, but for HT applications the mass of a double drywall with Green Glue damping will give better results (with clips you can do better than that, too). Very likely cheaper, too.

Here's one of the good threads:

http://www.avsforum.com/t/1280206/sorry-another-quietrock-vs-green-glue-thread
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post #3 of 11 Old 11-05-2013, 02:39 PM
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The products (probably sponsors) demonstrated here are good products - and I'm sure these results are not doctored beyond what you saw.

BUT!

For home theater sound containment this is inferior and more costly than the generally accepted best practices most builders in this forum use.

(Also, did you notice they set up the SPL meter next to the hole they punched in the wall? AND the wall wasn't constructed as it should have been, despite being staggered stud.)
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post #4 of 11 Old 11-05-2013, 03:24 PM - Thread Starter
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What interested me was that they claimed it was as good as 8 layers of sheetrock... If it was then it would be a better deal than using sheetrock. I wouls like to retain as much space as possible in my Garage as possible but make it to where you hear nothing outside of the room.

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post #5 of 11 Old 11-05-2013, 04:58 PM
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Quote:
Originally Posted by ellisr63 View Post

I found this on youtube and it looks like it might be a great product for my future HT...
https://www.youtube.com/watch?v=ZlAZsYp2M-U


Any comments?

I was looking at Quiet Rock 550 which is their 1-1/4" product with 70 STC rating. At approximately $200 a sheet.......plus labor quote to install was incredible! Each sheet weights in at 190 lbs each. Needless to say, I left that option in the dust! Even the Quiet Rock 510 which is 5/8" was close to $100 a sheet. Forget this option.

Use clips channels with Green Glue and you'll be fine. wink.gif

In my install, since theater is adjacent to kitchen and dining......I have added two more layers of DW with GG out side the theater and have STC rating of more than 65! In other words, HF noise is 65+ db less in kitchen than theater.

DW is much more cost effective and does as good a job as Quiet Rock.
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post #6 of 11 Old 11-05-2013, 05:55 PM
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Quote:
Originally Posted by ellisr63 View Post

What interested me was that they claimed it was as good as 8 layers of sheetrock...
This may be true - I don't know. But you have to ask, sheetrock of what thickness? And, they mean plain sheetrock - without viscoelastic damping. You can get better performance from viscoelastic damping (Green Glue) that is field-applied.
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post #7 of 11 Old 11-05-2013, 06:37 PM - Thread Starter
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So how many layers of sheetrock, OSB , and greenglue will I need to cut the noise down to zero outside the garage HT? My HT will have 3 LaScalas, 8 Heresy Industrial HIPs, and a Triax sub.

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post #8 of 11 Old 11-05-2013, 08:03 PM
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Quote:
Originally Posted by ellisr63 View Post

So how many layers of sheetrock, OSB , and greenglue will I need to cut the noise down to zero outside the garage HT? My HT will have 3 LaScalas, 8 Heresy Industrial HIPs, and a Triax sub.

Can't deny the laws of physics.......................probably not going to happen.

I have an S2 and will soon add 4 more 18" subs........................................I'm not worried! biggrin.gif

With four layers of either 5/8'' rock and OSB......................clips and channels inside the theater, my sound proofing endeavor was a success........but no where near zero.

Will add...........the weakest link in my soundproofing efforts was my entrance door in theater. To resolve issue, I have a double door system which cuts off the last ounce of acoustic energy...................containing sound is not an issue in my case! wink.gif
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post #9 of 11 Old 11-05-2013, 08:11 PM - Thread Starter
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Quote:
Originally Posted by doublewing11 View Post

Can't deny the laws of physics.......................probably not going to happen.

I have an S2 and will soon add 4 more 18" subs........................................I'm not worried! biggrin.gif

With four layers of either 5/8'' rock and OSB......................clips and channels inside the theater, my sound proofing endeavor was a success........but no where near zero.

Will add...........the weakest link in my soundproofing efforts was my entrance door in theater. To resolve issue, I have a double door system which cuts off the last ounce of acoustic energy...................containing sound is not an issue in my case! wink.gif

So how many db were you able to cut it down? I plan on doing double doors also.

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post #10 of 11 Old 11-05-2013, 08:37 PM
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Quote:
Originally Posted by ellisr63 View Post

So how many db were you able to cut it down? I plan on doing double doors also.

About 65+ db difference......................with peaks of 115 db in room, my meter would hit 49- 50 db in kitchen. Now remember...............there are other noises in kitchen that elevate the noise floor so it could be higher, but those are my measurements.

The real question should be..............................are there any noise levels in theater room coming from the rest of the house. And the answer is.....................


NO!!!!


wink.gif
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post #11 of 11 Old 11-05-2013, 08:53 PM - Thread Starter
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Quote:
Originally Posted by doublewing11 View Post

About 65+ db difference......................with peaks of 115 db in room, my meter would hit 49- 50 db in kitchen. Now remember...............there are other noises in kitchen that elevate the noise floor so it could be higher, but those are my measurements.

The real question should be..............................are there any noise levels in theater room coming from the rest of the house. And the answer is.....................


NO!!!!


wink.gif
That would be fine with me if I could knock it down 65db. smile.gif

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