Wall Coverage Calculator
Ceiling Coverage Calculator
What assumptions does the calculator include?
The above calculators assumes that you have hard surfaces on your walls, ceiling and floors. This calculator uses the RT60 formula in it's calculation method.
Does placement of acoustics make a diffference?
Yes, ideally two perpendicular walls should be treated if possible.
Here are some other sites that offer acoustic coverage calculations
Acoustimac has great calculator: http://www.acoustimac.com/room-calculator?limit=all
Audimute also has an online calculator: http://www.audimuteacousticpanels.com/acoustic-noise-reduction
Universal Acoustics has a calculator: http://www.universal-acoustics.com/docs/latest_news/room_kit_calculator.shtml
Acoustical Surfaces has a manual formula: http://www.acousticalsurfaces.com/blog/soundproofing/how-much-do-i-need/