I'm getting ready to finish out my home theater, which is located on the second floor of my house. Since the construction is a basic plywood floor over 2x12 trusses, with a standard sheetrock ceiling below, I'm very concerned that the room(s) below the theater are going to get pounded with sound (especially bass) when the theater is cranked. This is a problem. At this stage of construction, are there any soundproofing techniques that could be reasonably implemented to reduce noise pollution (especially bass) to the remainder of the house? Thanks.