I live in a house that has a basement, first floor, and a second floor. My subwoofer and all are on the first floor. My concern is that since the floor is sort of carpet cushion and plywood that I am losing sound to the basement. The basement isn't finished, so you can see the wood material if you are in the basement. Is there some sort of material I can put on the bottom of that floor to keep some of the subwoofer frequencies in that room and not escape through the floor?