Classroom Basics RECLAIM® Stick-On Decorative Acoustic Panels beautify a room while helping to absorb reflection to reduce flutter echo and other common acoustic problems. Like our top-selling acoustic room dividers and desk dividers, these hexagon-shaped panels are made from post-consumer recycled PET. Rated to absorb 75% of ambient noise that passes through the material (NRC 0.75), they reduce the amount of sound bouncing off of walls.