2 Inch Studiofoam ® Wedges ™ are the most popular Studiofoam ® profile! They can be used to treat small- to medium-sized areas, including vocal booths, control rooms and tracking studios. 2 Inch 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.