Hello, first time guy here... searched archives and haven't found much on this specific situation everything I saw is mostly dealing with stand alone spaces. I'm currently putting together a multi room facility in Los Angeles. The facility will have several individual production studios that will be located side by side due to space. These rooms will be used as writing and mixing rooms of various genre's including bass heavy dance electronic types... Regarding wall systems... I've planned to do the room with in a room concept using a double leaf separate 2x4 frames with 4" air gap and each leaf consisting of 5/8" - Greenglue -5/8" with Roxul between inner studs for each room. My question is, would this create a quadruple leaf effect to the neighboring studios? Would I be better using the full air gap (28") and keeping it double leaf and beefing each leaf up more?
Another idea I had was to use a 1 leaf "separation wall" that would go from floor to roof and then use a 1 leaf inner wall with say a 8" air gap from separation wall for each studio which would have a decoupled ceiling attached to each inner wall. Would this be a triple leaf situation from room to room? I guess I know the answer in theory but wondering what other concepts are out there or if this could work given the size of the gaps?
I've built several of my own rooms over the years and have had generally good results using existing walls and adding a leaf over or doing double leaf with THX Quietrock but have to keep an eye on the material costs on this one... Have done the 5/8 - Greenglue combo with success. With this said, would using THX for the above separation walls be more effective? Maybe a 2 leaf single frame stuffed THX separation wall? Hmmm...
Thoughts? Been contemplating...
Dealing with Quad Leaf Effect in Multi room design?
-
dtrumfio
- Posts: 1
- Joined: Wed Mar 30, 2016 3:39 pm
- Location: Los Angeles
- Contact:
-
Soundman2020
- Site Admin
- Posts: 11938
- Joined: Thu Aug 21, 2008 10:17 am
- Location: Santiago, Chile
- Contact:
Re: Dealing with Quad Leaf Effect in Multi room design?
Hi there " dtrumfio",and Welcome! 
Like this:
That's the most effective, lowest cost way of isolating rooms in a studio, or adjacent studios, or any set of rooms that need acoustic separation.
Those are all tuned systems: you tune them by putting the right amount of mass on each leaf (thickness of drywall, layers of drywall), and having the right size air gap between the leaves, with the correct type/thickness of insulation in the cavity. So depending on what level of isolation you need between adjacent rooms, and what frequencies you need it at, you would adjust the construction details.
- Stuart -
It seems like you have a misconception about what "room-in-a-room" design really is, and how it works. If you do it correctly, you always end up with only two leaves between any two adjacent rooms, and also between any given room and the outside world.My question is, would this create a quadruple leaf effect to the neighboring studios? Would I be better using the full air gap (28") and keeping it double leaf and beefing each leaf up more?
Like this:
That's the most effective, lowest cost way of isolating rooms in a studio, or adjacent studios, or any set of rooms that need acoustic separation.
Those are all tuned systems: you tune them by putting the right amount of mass on each leaf (thickness of drywall, layers of drywall), and having the right size air gap between the leaves, with the correct type/thickness of insulation in the cavity. So depending on what level of isolation you need between adjacent rooms, and what frequencies you need it at, you would adjust the construction details.
- Stuart -
-
John Sayers
- Site Admin
- Posts: 5462
- Joined: Mon Jan 27, 2003 12:46 pm
- Location: Australia
- Contact:
Re: Dealing with Quad Leaf Effect in Multi room design?
What Stuart says is correct, as always
But there's a twist to it. I had this problem when I designed two control rooms adjacent to each other with a double layer of drywall and an air space - I was told they would be post production rooms and having been a post production mixer I expected the speakers to run at around 85db.
But my client decided to test it and put a pair of large 1038B Genelecs in one room and ran them full bore at 120+db with the lights flashing - you could hear it in the adjacent control room. He insisted he didn't want that.
We eventually fixed it by removing the side walls of the control rooms and putting a staggered stud wall floor to ceiling with a double layer of 16mm drywall on each side - we then rebuilt the side walls, albeit slightly narrower and it worked albeit being a 4 leaf system. You could not hear the adjacent control room.
Interestingly the original double leaf system worked for the other walls, i.e. in the hallway behind the control rooms the double leaf worked and you could not hear the Genelecs full bore.
But the hallway wall behind the control room also went all the way to the ceiling which IMO is why it worked. You are isolating air masses. The hallway air was not connected to the control rooms air cavities, once we put up the divider wall between the control rooms the air cavities for each control room were isolated.
I hope this helps
cheers
john
But there's a twist to it. I had this problem when I designed two control rooms adjacent to each other with a double layer of drywall and an air space - I was told they would be post production rooms and having been a post production mixer I expected the speakers to run at around 85db.
But my client decided to test it and put a pair of large 1038B Genelecs in one room and ran them full bore at 120+db with the lights flashing - you could hear it in the adjacent control room. He insisted he didn't want that.
We eventually fixed it by removing the side walls of the control rooms and putting a staggered stud wall floor to ceiling with a double layer of 16mm drywall on each side - we then rebuilt the side walls, albeit slightly narrower and it worked albeit being a 4 leaf system. You could not hear the adjacent control room.
Interestingly the original double leaf system worked for the other walls, i.e. in the hallway behind the control rooms the double leaf worked and you could not hear the Genelecs full bore.
But the hallway wall behind the control room also went all the way to the ceiling which IMO is why it worked. You are isolating air masses. The hallway air was not connected to the control rooms air cavities, once we put up the divider wall between the control rooms the air cavities for each control room were isolated.
I hope this helps
cheers
john