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Whoa! Stop! Your control room is an inverted funnel! :shock: :!: Now way on this planet that is going to work! Did you not see the design that Glenn suggested for your studio? That one WILL work. What you have will NOT. - Stuart -

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I wasn't sure how long it was going to take to show the flaw in your window plug but you finally showed it. I can tell you several things about one of those...having had one myself. The heat that builds up in the pocket between the glass pains and the interior plug is enough to bleach (UV) the material in that pocket. Bend, warp and crack glass. The other is you did exactly what anyone here would have suggested you to NOT do, had you asked. In the real world, a 3 leaf only exists if there is a layer of mass and a decoupled frame which helps to introduce an air space TIMES 3. Example Gratis, a hard boundary on a frame/air space, a hard boundary on a frame/air space, a hard boundary on a frame. The issue is that the small air space(s) create an acoustical hole depending on the material and size of the assembly, based on vibration of the hard masses coupled to the air space(s). With your plug you have developed something similar to this, in the on line world, what is a representation of a 3 leaf. It is in effect a two sided coupled assembly with a separate leaf, this final leaf might be the window. Fact is they are all flanking and coupled together. It would have been better had you placed all the mass you installed BACK-TO BACK with no airspace (the insulation denotes an air space) which will give you a higher transmission loss barrier than what you have now.

Unfortunately, Brien is absolutely correct: you have built a three-leaf window plug, which will weaken your isolation, and it will become a 4-leaf structure when you add the inner leaf. It also seems like you are doing the same on the ceiling. Images 76.jpg, and 82.jpg show that the ceiling above you has an airspace with something more above it (upper floor? roof?) Either way, that is already two leaves. When you build your inner-leaf, then you will add a third leaf. The garage door appears to be another potential 3-leaf, but hopefully the mass in that block wall will be enough to compensate. Perhaps the underlying problem here is that you are rushing into construction without even having a basic plan in place yet, nor having asked the experts how to do the stuff that you have already done. Showing pictures after the fact is very useful to help you stop doing silly things along the way. Photos of work in-progress is much more useful, since then you don't have to go back and rip out to much that you already did, in order to get back to a point where you can proceed correctly. If I were you, I would stop right now, send the workers home for a couple of months, and work on finalizing your actual design before proceeding again. They way you have gone so far does not bode well for the future success of your studio. - Stuart -

"Unfortunately, Brien is absolutely correct:" Old timers around here might say "even a blind squirrel gets an acorn".