Acoustic Panel 24x48x3 Inches for Home Theater or Sound Studio (Royal Blue) These premium 3 inch thick, 24x48 in acoustic panels provide a clearer, more enjoyable sound by effectively controlling unwanted flutter echo and slap back reverb. The professional look complements studios, auditoriums, and living spaces. Made with fire resistant stone wool, solid wood frames and fiber cloth backing. Superior in effectiveness in comparison with any other absorption material including studio foam (up to 4 times more effective than studio foam at absorbing frequencies below 500 Hz) World-class sound absorption using the same materials found in multi-million dollar production studios and sound halls. Installation is easy and as simple as hanging a piece of art.