The Auralex 1 Inch Studiofoam ® Wedges ™ work most effectively on mid to high frequencies, and may be used to acoustically treat walls or ceilings. They can be used to treat small- to medium-sized areas, including vocal booths, control rooms and tracking studios. Studiofoam ™ is quite simply the workhorse of the industry, and is your safest bet if you're tuning your room yourself, without the help of a professional acoustician.
Please Note: Not for sale in California due to Prop 65 restrictions. See Important Notice Regarding Flammability of Foam Products