I am new here, so let me shortly present myself and my project.
I am the co-owner of a small vinyl record label, and music production company, Beamhole Interprize, that we have started on the side of our regular jobs. I work full time as a Radio Broadcast engineer.
We (beamhole) have just aquired some space in town for an affordable price, with all the problems that comes along with such a place when you want to build a small recording environment. - So now it is my job to try and find a design that we will be happy with given the money we have and so forth.
The first and (one of the ) biggest problem i have right now is the floor. The room is located on the 2nd floor and the floor is an old wooden plank floor. One end wall is just a thin gypsum wall, which has cut the room in half. One side is ours, and the other side belongs to an other company. The floor runs under this gypsum wall and is shared between the two rooms.
As it is an old floor it cannot hold a concrete slab, so after having red "build it like the pros" i found a part in the end of the book where Ron talks about a studio project where he made a decoupling floor system with rigid fiber glass (page 269).
The concept was to build the walls and ceiling structure floating on the existing floor, and then build this floor inside this new box (one layer of rigid fiberglass and two layers of plywood).
this would be a really good way to go for me, if i couldt get it to work. - The difference is that he build it on top of a concrete plank deck, i have a somewhat thinner wooden plank deck with some old filler underneath.
But my question is - in order to lower the resonance of the floor and make it a bit of a better absorber at lower frequencies, would it be better to place the structure (walls and ceilings, I am building a room in a room) on the floating floor itself, thereby adding mass to it (though it wouldnt be evenly distributed )? - And also wouldt i benefit from adding green glue in between the two layers of plywood.
As i see it, this floor is my main problem because of the flanking that can happen. The basement underneath the floor is not used, so noise here is not a problem, but the travelling noise is.
Thankyou for reading all of this