What is NOISE REDUCTION COEFFICIENT? What does NOISE REDUCTION COEFFICIENT mean?

NRC (Noise Reduction Coefficient) the effectiveness of an absorptive material or surface as compared to a theoretically perfect absorber. A sound absorber is designed to deaden sound within a room, to eliminate the reverberation of sound and to reduce the build-up of sound within an enclosed space. The higher the number the better the absorption hence improvement in acoustic comfort. It has a relatively little effect on the transmission of sound into an adjoining area.