insulation ?

[axeman_ukl]

now in the walls of a isolation booth can you use the 6" thick insulation (alot cheaper than the 30-50 mm thick compressed insulation) ?
if the stud wall was 12" thick to allow for two layers of the insulation would this give you the same as a stud wall say 6" thick with the compressed insulation or would they be the same ?

[gullfo]

depends. if the insulation is for treatment, then compressing it will help but the rigid insulation will still be more effective. if its to dampen the walls internally, then don't compress it too much as you just want to dampen the panels and avoid resonances in the air cavity.

[cusebassman]

Originally Posted by axeman_ukl

now in the walls of a isolation booth can you use the 6" thick insulation (alot cheaper than the 30-50 mm thick compressed insulation) ?
if the stud wall was 12" thick to allow for two layers of the insulation would this give you the same as a stud wall say 6" thick with the compressed insulation or would they be the same ?

What is your general location, axe? I've got about 1 1/2 rolls of R-19 6.5" fiberglass ins. that I am lookin to get rid of. Shipping would be pretty pointless I suppose, but its worth a shot to ask

[Rod Gervais]

Originally Posted by axeman_ukl

now in the walls of a isolation booth can you use the 6" thick insulation (alot cheaper than the 30-50 mm thick compressed insulation) ?
if the stud wall was 12" thick to allow for two layers of the insulation would this give you the same as a stud wall say 6" thick with the compressed insulation or would they be the same ?

Axe,

if the wall was 12" think you would get quite a big bang for your bucks - the added air space would be a big benefit.

In the 6" wall you really would not gain anything by adding the compressed insulation -

The compresseed insulation (by this I assume you refer to the rigid insulation typically used for room treatments) usually ends up with a loss in LF TL values - not a gain. High frequencies are never a problem in comparison. The same applies if using rockwool.

Rod

[axeman_ukl]

Originally Posted by cusebassman

What is your general location, axe? I've got about 1 1/2 rolls of R-19 6.5" fiberglass ins. that I am lookin to get rid of. Shipping would be pretty pointless I suppose, but its worth a shot to ask

leeds ,england

[axeman_ukl]

Originally Posted by Rod Gervais

Axe,

if the wall was 12" think you would get quite a big bang for your bucks - the added air space would be a big benefit.

In the 6" wall you really would not gain anything by adding the compressed insulation -

The compresseed insulation (by this I assume you refer to the rigid insulation typically used for room treatments) usually ends up with a loss in LF TL values - not a gain. High frequencies are never a problem in comparison. The same applies if using rockwool.

Rod

so would the 12" thick wall take out lower frequancies better than the 6" wall with the rigid insulation

its more a for a drum isolation booth in the celler 8*8*6 feet the other walls are brick and the floor in concrete

i am after a room that will minamise sound escaping but give a good enviroment to record in.

[Rod Gervais]

Originally Posted by axeman_ukl

so would the 12" thick wall take out lower frequancies better than the 6" wall with the rigid insulation

Axe,

Yup.........

It's this way - any time you incease the air spring (wall thickness) you increase isolation at all frequencies.........

Also - installing rigid insulation in any wall is bad - use the fluffy fiberglass.......

Rod

[60's guy]

Originally Posted by Rod Gervais

Axe,

Yup.........

It's this way - any time you incease the air spring (wall thickness) you increase isolation at all frequencies.........

Rod,

Isn't this also along the same design principles that bass traps and mid absorbers are based on.... utilizing sealed layers of mass to air ratios?

Not sure I worded that correctly.

[Rod Gervais]

Originally Posted by 60's guy

Rod,

Isn't this also along the same design principles that bass traps and mid absorbers are based on.... utilizing sealed layers of mass to air ratios?

Not sure I worded that correctly.

Guy,

sealed traps work on that principle - yes.......

but the walls are working a bit differently in the sense that the purpose of the insulation is to damp the surface.

With a sealed trap you are looking to absorb the sound - and with a wall you are looking to reflect the sound.

If you place insulation up against the panel on a sealed trap it won't work.

In the case of an isolating assembly If you don't put it against the drywall - you will TL value will not be as high.

I hope that helped..........

Sincerely,

Rod