I have a 10x15 room in my house and plan on building a small iso booth
in it, big enough for a few guitar cabs.

I will be monitoring from the same room, so it needs to be as sound
"proof" as possible. My neighboor is roughly 10 feet from the outside
wall.

I was thinking of adding 2 layers of drywall to the existing walls,
then framing in the entire iso booth with 2 layers of drywall on each
side. The question is, do I leave the open space between the walls
empty? Or will some sort of insilation be more effective than air
space?

(GVB) wrote in message om...
I have a 10x15 room in my house and plan on building a small iso booth
in it, big enough for a few guitar cabs.

I will be monitoring from the same room, so it needs to be as sound
"proof" as possible. My neighboor is roughly 10 feet from the outside
wall.

I was thinking of adding 2 layers of drywall to the existing walls,
then framing in the entire iso booth with 2 layers of drywall on each
side. The question is, do I leave the open space between the walls
empty? Or will some sort of insilation be more effective than air
space?

Air space is your friend when it comes to isolation. (That, and mass,
which the double layers of drywall will achieve.) Leave it empty,
there's no point in filling it with fiberglass or foam or jello or
straw or whatever.

Though you could put a free-standing layer of reinforced loaded limp
mass vinyl barrier in the air space. It might help with sound
isolation, and at the very least it would go a long way to making you
think you'd done everything possible to isolate the noise. Don't take
that last statement lightly; if your neighbor *does* complain about
the noise, being able to say "I'm sorry, but look I've got my amp in
an iso booth made of two double-layers of sheetrock, a 1" airspace,
and a layer of loaded vinyl noise barrier" he'll probably go away
happy. If you demonstrate to your neighbor that you've already made
extensive concessions to his comfort, he may actually tolerate a whole
lot more noise than if he saw you were just sticking your amp in the
closet.

after taking some measurements, I dont think I am going to have enough
room to build the "box inside the box".

question about resilient channels:
for the exterior walls which already have a layer of drywall on them,
should I throw some resilient channels up, then another two layers of
drywall? I've never used the channels before, so I am not really sure
where they go in the layers and how many layers of sheetrock they will
support, etc..

for the interior wall, i planned on doing the 2x6 w/ staggered studs,
insulation layed horozintal weaving in and out of the staggered studs,
and two layers of drywall on each side. same question applies here
about the channels...

i do plan on siliconing the hell out of everything to get things as
airtight as possible. when hanging drywall, i've typically left gaps
on the ground, what method is used when soundproofing? no gaps?

i also plan on using soundboard to deaden the room a little bit.
should this be the last layer hung?

thanks for the help!

(Buster Mudd) wrote in message news:
Air space is your friend when it comes to isolation. (That, and mass,
which the double layers of drywall will achieve.) Leave it empty,
there's no point in filling it with fiberglass or foam or jello or
straw or whatever.

Though you could put a free-standing layer of reinforced loaded limp
mass vinyl barrier in the air space. It might help with sound
isolation, and at the very least it would go a long way to making you
think you'd done everything possible to isolate the noise. Don't take
that last statement lightly; if your neighbor *does* complain about
the noise, being able to say "I'm sorry, but look I've got my amp in
an iso booth made of two double-layers of sheetrock, a 1" airspace,
and a layer of loaded vinyl noise barrier" he'll probably go away
happy. If you demonstrate to your neighbor that you've already made
extensive concessions to his comfort, he may actually tolerate a whole
lot more noise than if he saw you were just sticking your amp in the
closet.

Air space is your friend when it comes to isolation. (That, and mass,
which the double layers of drywall will achieve.) Leave it empty,
there's no point in filling it with fiberglass or foam or jello or
straw or whatever. BRBR


Loosely packed fiberglas insulation is better than air alone in double wall
construction. If nothing else, it dampens the resonance of the air cavity.


Joe Egan
EMP
Colchester, VT
www.eganmedia.com

for the interior wall, i planned on doing the 2x6 w/ staggered studs,
insulation layed horozintal weaving in and out of the staggered studs,
and two layers of drywall on each side. same question applies here
about the channels... BRBR


Find a copy of the Jeff Cooper book. It goes into detail about different wall
construction techniques and their STC ratings.

Also-

Make sure you pay the same attenion to the ceiling, floor, and doors as you do
to the walls. If you skimp in one place, you might as well skimp everywhere.
It will save time and materials and the effect will be the same.




Joe Egan
EMP
Colchester, VT
www.eganmedia.com