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Author Topic: What to fill wall to minimize sound transmission  (Read 7466 times)

Stephen Swaffer

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Re: What to fill wall to minimize sound transmission
« Reply #10 on: December 23, 2016, 10:45:26 am »


I assume the offset studs help to keep any resonances down within the wall?

To prevent sound transmission through the studs.  Sound doesn't just travel through air.
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Steve Swaffer

Keith Broughton

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Re: What to fill wall to minimize sound transmission
« Reply #11 on: December 23, 2016, 10:52:01 am »

What is the theory behind staggered or offset studs?
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Ivan Beaver

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Re: What to fill wall to minimize sound transmission
« Reply #12 on: December 23, 2016, 11:42:33 am »

What is the theory behind staggered or offset studs?
The best thing to block sound transmission is MASS-AIRPSPACE-MASS.  With NO connection between the two mass walls. 

The idea is that walls would not be attached to each other.

So it acts as a vibrational isolator.

But this means starting the wall from scratch.  It will also make the wall thicker.

The problem in a typical contractor situation is finding a contractor who UNDERSTANDS the whole idea between sound isolation.

If they mess up the install, the whole idea starts to fall apart.

Often they don't understand why they are doing it and don't follow instructions.

You often have to be there AS THEY DO IT and watch them.

Because one the wall is covered up, you don't really know what they have done
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Nathan Riddle

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Re: What to fill wall to minimize sound transmission
« Reply #13 on: December 23, 2016, 12:01:12 pm »

So really what I need to say is two completely built walls as the "MASS" with an airspace in between.

That's do-able, but I believe they are building the wall themselves and I need to give the specifications on doing said thing.

So:

Student, loud space.

1) Sheetrock + finish/paint
2) Rockwool & stud
3) sheetrock

4) airspace (1-2")

5) Sheetrock
6) Rockwool & stud
7) Sheetrock + finish/paint

Kids quiet space.

The main difficulty is putting both sheetrocks on the inner part of the wall.
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Hal Bissinger/COMSYSTEC

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Re: What to fill wall to minimize sound transmission
« Reply #14 on: December 23, 2016, 12:55:02 pm »

I know in the past I have seen several designs for a sound proof deadening partition but I wouldn't know where to look now. Some might have been posted here. I remember special sheet rock from one manufacturer. You might check USG. Presenting the contractor with an architectural detail of the partition should eliminate any misunderstandings.

-Hal
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Stephen Swaffer

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Re: What to fill wall to minimize sound transmission
« Reply #15 on: December 23, 2016, 01:38:50 pm »

I have dealt with installs where they used a sound deadening sheet material kind of as an " underlayment" material under the sheetrock don't know what is called but similar in look/ feel to ceiling tile.
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Steve Swaffer

Cailen Waddell

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Re: What to fill wall to minimize sound transmission
« Reply #16 on: December 23, 2016, 03:42:11 pm »

I have dealt with installs where they used a sound deadening sheet material kind of as an " underlayment" material under the sheetrock don't know what is called but similar in look/ feel to ceiling tile.
Homasote

I've seen it used in floors but not walls... 


Sent from my iPhone using Tapatalk
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Caleb Dueck

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Re: What to fill wall to minimize sound transmission
« Reply #17 on: December 23, 2016, 04:30:09 pm »

Here's what I have seen-

-staggered studs with gap between the two walls
-studs 6"-12" rather than the standard 16" for each wall
-dual thickness sheetrock on the outer surface of each wall
- dual layers of MLV (Mass Loaded Vinyl) between the two walls.  See here for examples
http://www.asiproaudio.com/noise_barrier.htm

It works very well for sound transmitted through a wall.

Edited to add- don't forget doors and windows, any air gaps, and the ceiling.  Treating walls is only a quarter of the issue. 

For suspended grid ceilings, plan on ceiling tiles designed to block sound, then MLV or similar above, then absorption above that.  Bonded Logic cotton insulation, 8" thick, is flame retardant and works well, comes in 24" wide rolls.  This does a little to block sound, but more to knock down the sound bouncing between the ceiling tiles and the upper deck. 
« Last Edit: December 23, 2016, 04:37:10 pm by Caleb Dick »
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duane massey

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Re: What to fill wall to minimize sound transmission
« Reply #18 on: December 26, 2016, 02:36:56 am »

Simplest, least expensive and most effective solution is basically what Iven spelled out pretty clearly. Two completely isolated walls which must extend all the way to the roof. Ceilings should be floating as well well, attached onlt y yo their relative room walls. Each wall space should be insulated. I've built three different DIY studis using these methods and was amazed at how well it works. If there is a common door you will need to do some thinking about the doors as well, but if there are no common (shared) doors, then a solid door in each location will probably be adequate. Saying all that, if your concern is noisy kids, not a live band or DJ, the basic double wall approach may even be overkill, but it will really work well. Other things can also cause concerns, especially shared duct work, shared ceiling space, etc. Maybe a drawing of the actual layout would help us, as well as the actual type of noise you are dealing with?
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Duane Massey
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Ivan Beaver

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Re: What to fill wall to minimize sound transmission
« Reply #19 on: December 26, 2016, 09:33:14 am »

I think this might have been pointed out, but filling the wall with ANYTHING will just increase the sound transmission between walls.

Think of it this way-sound travels with less loss through ANY material-solid or liquid.

Even air.  There is less loss with high humidity than with dry air.

ISOLATION -floor to ceiling is the BEST thing.

If you can get 2 "limp mass" walls with air between, that is the winner.
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Ivan Beaver
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ProSoundWeb Community

Re: What to fill wall to minimize sound transmission
« Reply #19 on: December 26, 2016, 09:33:14 am »


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