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Soundproofing Forum Topics => Other Soundproofing Questions => Topic started by: mbstudioservices on December 30, 2014, 08:57:56 PM

Title: newbie questions regarding sound proofing a office suite in an old building
Post by: mbstudioservices on December 30, 2014, 08:57:56 PM
I am building a small 10' x 8' voice over studio, 2 of the walls are common and there is no insulation in the wall between the studs.

Question#1 Will filling these walls with expanding foam help with preventing outside noise ?

Above the dropped t bar ceiling is a large open space goes throughout the building.

Question#2 Will using moving blankets or mineral wool laid over the ceiling tiles help prevent outside noise ?

I have mounted 1/2" soundboard on the walls.

Question#3 Should I add a 2nd layer of drywall or rubber backed carpet tiles ?

I also have 2 panels of  2" foam egg crate panels that are 4' x 4'

Question#4 Should I purchase enough egg crate to cover all the walls ?

any advice will be greatly appreciated

Title: Re: newbie questions regarding sound proofing a office suite in an old building
Post by: Randy S on January 03, 2015, 03:58:10 PM
First off, we need to know what type of noise infiltration you are dealing with?
ex: traffic noise / music / people talking?

Your T-bar ceiling will be the variable that decides what is effective to do to the walls.

Let me know.

Randy S.
760-752-3030 ext 3095
Title: Re: newbie questions regarding sound proofing a office suite in an old building
Post by: mbstudioservices on January 05, 2015, 07:27:08 PM
First off, we need to know what type of noise infiltration you are dealing with?
ex: traffic noise / music / people talking?[/i]

the Type of noise I am dealing with is people talking.
Title: Re: newbie questions regarding sound proofing a office suite in an old building
Post by: Randy S on January 05, 2015, 07:44:29 PM
ok, people talking is not bad at all.
Insulate every cavity, leave nothing hollow.
Seal this room air tight water tight, no leaks.
you need to double the weight of the wall so add 2 layers of Mass loaded vinyl followed by 5/8" drywall.
the T-bar ceiling all you can do is add a layer of mas loaded vinyl and use r19 insulation above the mass loaded vinyl..
If your return air is open then you will need to duct it back to the unit.

Treatment of the room acoustics for voice over rooms would be full coverage.


Randy S.
Title: Re: newbie questions regarding sound proofing a office suite in an old building
Post by: mbstudioservices on January 06, 2015, 06:04:32 PM
I have already mounted 4x8 sheets of 1/2" sound board on the walls, will I run into problems mounting mass loading vinyl onto the sound board ?
Title: Re: newbie questions regarding sound proofing a office suite in an old building
Post by: Randy S on January 06, 2015, 06:11:07 PM
No, that will be fine because you are not doing a decoupled system, you are applying mass law.
in the future, avoid using soundboard it is waste of money.
Title: Re: newbie questions regarding sound proofing a office suite in an old building
Post by: mbstudioservices on January 06, 2015, 06:48:54 PM
I don't have permission to remove the drywall so that I can fill the cavity with insulation, my only alternative is to fill the empty cavity with expanding foam. I know this can get expensive and messy, the other option I was looking into was using rubber mulch made of recycled tires.
 
I have also purchased 2 sheets of egg crate foam, each sheet is 4' x 4' x 2" thick, should I bother using this ?
Title: Re: newbie questions regarding sound proofing a office suite in an old building
Post by: Randy S on January 06, 2015, 07:38:08 PM
do not do expanding foam, use blown in cellulose. The expanding foam could cause more coupling allowing more sound to pass.

Your egg crate foam is for conditioning the room so go ahead and use it after your done soundproofing.


Randy S.