Good Mass?

[role65]

Hey all,

I think i'm finally ready to get started building my studio... I got some great advice from Panda Monk several months ago... I still have one question

I'm in a basement and my main concern is noise transferring through the ceiling/floor. I was advised to add mass under the subfloor ( basement ceiling) I have a bunch of OSB left from building the house would a couple layers of osb with 5/8" drywall on top be good mass?

my thinking
Leaf 1
layer 1 brazillian hardwood-3/4" (upstairs floor) and pad/carpet in 1 room
layer 2 3/4 subfloor
layer 3 5/8 OSB
layer 4 5/8 OSB
layer 5 5/8 Drywall
layer 6 R-19 insulation (pink fiberglass)
air Space

Leaf 2 Drop ceiling acoustic tile

Will the osb add anything at all? i just have it laying around and thought it might work? 5/8 drywall is a fortune right now so looking for ways to save without huge compromise...
also i don't need it to be sound proof just not waking up the kids who are an the 2nd floor...

what do i use on the joist? or for what i want does it matter?
thanks guys!
Ryan

 

[bpape]

While the extra mass can help, quite honestly, you'd get better results with insulated cavities and a real drywall ceiling instead of acoustical drop ceiling. It'd probably cost you less than the drop ceiling too.

If you want some extra decoupling, use slats running perpendicular to the joists and attach the drywall to that.

Bryan

 

[role65]

I really have no use for all the scrap osb so could i do both. use osb and insulation then 5/8 the ceiling?


Ryan

 

[bpape]

Adding a little extra mass would help but don't go overboard. Part of the isolation is also the cavity depth which drops the resonant frequency.

Bryan

 

[role65]

10-4 really just concerned with a drum room for the most part...why is that drummers have 1 dynamic "F'n Loud" except for good drummers...I tell them all the time if you play @ 60% the 100% parts feel like 120% if you play at 90% the 100% feels like 90%...I digress...Thanks for the advice...

Ryan