When I moved into my current house a little over a year ago, I turned one of the spare bedrooms into an office / studio for working on sound, machinima, etc. Most of the time, interior walls in a single-family home do not get insulated, they're just two sheets of drywall separated by studs made of either steel or wood depending on what climate you live in. Regardless, those standard walls do little to dampen noise from adjoining rooms. Below, I'm going to detail what I did to turn this potentially noise-overrun room into my little machinima fortress of solitude.
noise reduction
noise-reduction