Hello all!
So I'm starting a new thread on my studio construction, hope to get got tips on acoustics. Also I will post pics on studio construction...
So i guess the first thing is po post the sketchup of the studio.
So, we have a basement (4x4 m) and we built a booth (2,20 x 2,10 m) out of double drywall (knauf) panels and fill the middle with rockwool so the booth will be sound isolated (the wall is 15cm thick). The ceiling will be lowered and insulated with rockwool, and carpet flooring.
Walls inside the booth will be covered with absorbent panels (5cm panels like OC 703) and cloth. Two walls will be out of angle so there are no paralel walls.
My biggest issue is with these walls. I was thinking of puting slats on the red wall horizontally to make a broadband resonator. So I guess that the space between the concrete house wall and the slats need to be airtight in order for the resonator to work properly...
Please, if you have any more ideas for acoustics of the booth... The studio will be used to record mostly acoustic instruments (tamburitza - a Croatian native instrument, like a guitar... kind of), and vocals. Thanks for any tips.
Small basement studio
Originally posted at johnlsayers.com, topic 11820.
When you say "double drywall panels", do you mean that you put two layers of drywall on one side if the studs, or that you put one layer on each side? One layer on each side is not good, since your house walls would make a third leaf. Also, how high is the ceiling?So, we have a basement (4x4 m) and we built a booth (2,20 x 2,10 m) out of double drywall (knauf) panels and fill the middle with rockwool
Why do you want to put carpet on the ceiling, if you you already have rockwool there? Do you mean special acoustically transparent carpet, that has no effect on sound? Or do you mean just any old piece of ordinary carpet? Acoustic carpet would work fine on the ceiling. Ordinary carpet would probably not be much use.The ceiling will be lowered and insulated with rockwool, and carpet flooring.
The entire BOOTH needs to be airtight! All four walls, and the ceiling, and the floor, all need to be sealed. If not, then you won't have decent isolation. In any event, you cannot use the space OUTSIDE the booth for acoustic treatment! Treatment goes INSIDE the booth. The air gap between the house wall (outer leaf) and the booth wall (inner leaf) is part of your isolation, not part of your treatment. Two different things. If you build the booth wall "inside-out", then you can put slot resonators on the walls, and use the stud space for absorption, as needed. Of if you build the wall normally, then you can build frames to hang on the wall, with your slot resonators over those frames.So I guess that the space between the concrete house wall and the slats need to be airtight in order for the resonator to work properly...
Try using the "search" feature of the forum, for terms like "vocal booth". I'm sure it will give you lots of useful information. - Stuart -Please, if you have any more ideas for acoustics of the booth...
I'm sory, I didn't make it clear. Carpet flooring is on the floor.
About the resonator, I just wasn't sure that the cavity between the outer leaf and the booth wall needed to be airtight in order for the resonator to work properly.
The booth will be airtight.. I just did it yestarday :-)
The treatment inside the booth will be made of acoustic panels all over the walls (I copied the design of a friend - profesional musician).
Today the works continue. I will take some pics and post them...
The "cavity" between the outer leaf and the wall is not part of the treatment: It is part of the isolation. In order to avoid the drop in isolation that this third-leaf will cause, you should in fact make that gap as large as you possibly can. If you put the booth close to a wall, that will create a third leaf, which of course reduce isolation at the low end of the spectrum. But that "cavity" will not have any noticeable effect on the slot resonator, as far as I can see, since it is totally outside both leaves: There is a full two-leaf MSM system between the "cavity" and the slot resonator, so any effect would be negligible, IMHO.About the resonator, I just wasn't sure that the cavity between the outer leaf and the booth wall needed to be airtight in order for the resonator to work properly.
You copied the design of the entire booth, or just of the treatment? If the booths are identical, then of course the treatment should work the same. But if there are appreciable differences in the booths, then the same treatment might work differently, depending on what it is. For example, if his slots were designed to deal with specific frequencies that are known to be a problem in that specific booth, but your booth has different dimensions, then it will be treating the wrong frequencies, and not treating the right ones... - Stuart -The treatment inside the booth will be made of acoustic panels all over the walls (I copied the design of a friend - profesional musician).