NRC and CAC Ratings
When evaluating performance in acoustic drop ceiling tiles, you’ll want to reference two general ratings: Noise Reduction Coefficient (NRC) and Ceiling Attenuation Class (CAC). NRC tells you how much sound a ceiling panel will absorb, thereby lessening the noise within a room. CAC rates the tile’s efficiency as a barrier to airborne sound transmission – meaning how much sound travels to adjacent rooms. The higher the rating, the better the ceiling is at noise control.
