Noise Reduction Coefficient definition

Noise Reduction Coefficient or “NRC” means noise reduction coefficient as set out in ASTM C423. NRC is a single number rating of the sound absorbing properties of a material – derived by arithmetically averaging the Sabine absorption coefficients at 250 Hz, 1000 Hz, 2000 Hz and 4000 Hz. An NRC of 0.00 indicates zero absorption while; an NRC of 1.00 indicates 100% absorption; (100) “Operation and Maintenance Information” or “O&M Information” has the meaning indicated in Section B.1.1 of Appendix 18F – O&M Information;
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Examples of Noise Reduction Coefficient in a sentence

  • The material shall have a minimum Noise Reduction Coefficient of 0.75.

  • Offerors must bid acoustic panels which have a minimum NRC (Noise Reduction Coefficient) rating of .80; STC (Sound Transmission Classification) rating of 23 or higher; meets or exceeds Speech Privacy/NIC (Noise Isolation Class) barrier ranking that 21 at a distance of 7 feet and flanking rating at of 22 at a distance of 12 feet.

  • Noise Reduction Coefficient (NRC) A single number rating of the sound absorption properties for a material.

  • SFT 100.00 629.97 62,997.00 33 Providing And Fixing In Position Wall Panelling At All Heights With Integral Densified Calcium Silicate Panels/Tiles Of Size 595 X 595Mm, Having Nrc (Noise Reduction Coefficient) Of 0.50 (Minimum) As Per Is 8225:1987, Light Reflectance Of 85% (Minimum).