After getting the idea from a post here I decided to get some rolls of insulation to see what they would do to room acoustics. I bought Mansville R-30 insulation rolls. They are about 25 inches wide by 20 tall rolled tightly and wrapped in plastic. I bought 12, the limit of my SUV hauling room, and stacked them in the front corners almost to the ceiling and in one of the back corners. My room is an odd shape so I don't have 4 corners. There is a resonant "cavity" cause by a window dormer cut into the side of the room that I haven't touched yet.
I measured the results with XTZ and my decay times have improved significantly in the mid-bass and upper freq. but I still have some serious energy below 20Hz.
My question is whether commercially available bass traps would offer significantly better performance or only a marginal improvement. I am using 4x the thickness of the commercial traps in insulation. Aesthetics are not a big concern, I will drape these in black cloth.
Is there a commercial product that will fix the sub 20Hz issue or should I just get more of these and treat the rest of the room? These only cost $9.50 a roll at Lowes. They cut the price by more than half recently.
