¶¡ÏãÔ°AV

NOISE REDUCTION COEFFICIENT (NRC)

The average of the ABSORPTION COEFFICIENTs of a material used in SOUND INSULATION, measured at frequencies of 250, 500, 1,000 and 2,000 Hz.

Compare: IMPACT INSULATION CLASS, NOISE ISOLATION CLASS, NOISE REDUCTION FACTOR, REFLECTION COEFFICIENT, SOUND TRANSMISSION COEFFICIENT.


home