I'm looking into constructing a 6ft(W) x 6ft(D) x 7ft(H) soundproof room pretty soon. This is to mainly keep noise from going out of the room rather than coming in from the outside (But eliminating noise coming in will be a great benefit).
The noise is really just meant to keep my voice in so people can't hear me unless I am practically screaming (It's a room for recording YouTube videos)
I will also be planning on having a move able wall instead of a door to make things easier on the whole construction process (unless that is a moronic idea?)
As of this moment I have decided to construct it like this:
Drywall (Outer) -> Insulation -> Drywall -> Green Glue -> Drywall -> Mass Loaded Vinyl (Maybe) -> Acoustic Foam (Just for decoration)
This room will be constructed in a garage so there is a possible issue with the concrete so would it be better to add a floor to the room or anchor the sides into the concrete and just have a thick carpet to buffer sound a bit more?
Is there anything else I should put into the construction to make the sound proofing more effective?
And I will also need ventilation so what would be the most effective way to do this? As of this moment I am just considering a soundproof ventilation duct hooked up to a portable air conditioner for air (Yes, this final part is a bit ghetto but I'm working on a budget)
Any help is greatly appreciated