1-inch Studiofoam Wedges perfect for those environments that demand good sound control, but where complete acoustic absorption isn't required or desired. It work most effectively on mid and high frequency sound waves and may be used to acoustically treat walls or most commonly ceilings (especially if they aren't parallel to the floor), even when the walls are treated with thicker acoustic Studiofoam. They effectively kill standing waves, flutter echoes and when used in conjunction with our low-frequency control products it can effectively provide full frequency absorption in virtually any room.