[masraum]

Originally Posted by zakthor

I had use of an expensive corporate sound deadening room. The silence was soooo comfortable.

I was psyched and wanted to ‘do’ a room in my house. My boss laughed, said id poop myself if i learned what it cost. He said you start with the foundation, then the suspended floor…

I've chatted with a guy that worked for a company that made software for voice stuff. He was a doctor of something. He told me about the noiseless room that BT has in the UK and how after a short period of time your own heartbeat seems really loud in your ears, and yeah, to get to crazy levels of quiet all sorts of stuff is required. I think a lot of those things have crazy thick concrete walls, suspended floors, and that sort of thing. I think you could make a room fairly quiet if you had the desire, but it wouldn't be cheap. For instance, there are places that sell drywall that's 1.5" thick (think about how much a 4x8 sheet of that weighs!). You can't pick that stuff up off the shelves at the big box stores. But you could do double, decoupled walls with insulation, multiple layers of multiple sorts of materials, etc.... The hard part would be silencing sound coming through and around the door and HVAC vents. Anywhere that air flows, sound flows, so under a door (needed for HVAC), through HVAC ducts, through/around outlets/switches, etc....

Probably a good way to go about it would be to look into recording studio builds. There's a lot of stuff online found sound deadening/proofing.