noise reduction coefficient


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Related to noise reduction coefficient: Sound transmission class, sound absorption coefficient

noise reduction coefficient

[′nȯiz ri‚dək·shən ‚kō·i′fish·ənt]
(acoustics)
The average over the logarithm of frequency, in the frequency range from 256 to 2048 hertz inclusive, of the sound absorption coefficient of a material.

noise reduction coefficient, NRC

The average of the sound absorption coefficients of an acoustical material at frequencies of 250, 500, 1,000, and 2,000 Hz, expressed to the nearest integral multiple of 0.05.
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References in periodicals archive ?
The ceilings feature a noise reduction coefficient range between .60 and .70, a ceiling sound transmission coefficient range of 35 to 39, and a light reflection value of one.
Hytone Vantage 10 ceiling panels offer a Noise Reduction Coefficient (NRC) range of .50-.60 and a Ceiling Sound Transmission Class (CSTC) rating of 40-44.
It exhibits the outstanding FST performance of Ultem resin (it meets Ohio State University performance levels below 50/50) and offers excellent dielectric and acoustic properties, including demonstrated noise reduction coefficients of greater than 0.3.
It exhibits the outstanding FST performance of Ultem resin (it meets Ohio State University (OSU) performance levels below 50/50) and offers excellent dielectric and acoustic properties, including demonstrated noise reduction coefficients of greater than 0.3.
It has demonstrated noise reduction coefficients of greater than 0.3 and it also exhibits low moisture absorption, which may eliminate edge filling in some interior applications.