Sorry for the delay, I've been lucky to get 4 hours sleep a night lately -
I am renting the space so I can not change the construction of it.
So I was thinking on floating the floor in some way to stop noise from coming in from 1st floor tenants.
I know you think you've given enough detail, but this is a very serious thing; you can't just add weight to a building without knowing whether the structure is designed strong enough to hold it. Part of what may be confusing is that LIGHT weight floating floors don't work at lower frequencies, and heavy ones need MAJOR support or people get dead. So before we get much further here, you need to ask about construction of your building, specifically floor framing and load ratings.
If you do a lightweight floated floor, it will have a resonant frequency that's in the audible range; the only way that can work is if there is NO SOUND at that frequency that you want to attenuate, going EITHER direction. So, if you don't care that the downstairs neighbors hear what YOU do, but only care that you don't hear THEM, and if their noise isn't "subwoofer oriented", it may be possible to design a specific floated floor that could help isolate.
Doing this is beyond the amount of time either John or myself have to donate, so we would have to bill you for the time. My current rate is $120 per hour, John's is (I believe) $125 AUD per hour. The amount of time this would take depends a lot on the amount of information available on your existing construction.
Then soundproof the window with a 2nd window installed with space between them.
Good plan.
The walls ? maybe 1 layer of drywall over main wall with acoustical wedge foam.
You probably do NOT want your entire room "foamed" - it will sound like crap with that much mid/high mids "sucked out" of it. Better to use something like Auralex Pro Panels (if you don't want to DIY) and do first reflection points and behind speakers, all spaced a few inches from walls and ceilings.
I also would like to install a door between the lounge area and the recording area.
Check out
this thread for some ideas.
I will also build a 4x6 vocal booth.
YOu will get a much better sounding booth if you use odd dimensions; 3x5x7 or 5x7x9 will give more even modal responses than 4x4 or 4x6 by any dimension. Check out the REFERENCE section for wall building methods, booths are just small rooms so should be done same as larger rooms construction-wise.
HTH... Steve
Soooo, when a Musician dies, do they hear the white noise at the end of the tunnel??!? Hmmmm...
HELP PLEASE!!!!!!!!