PRODUCT TERMS
NRC (Noise Reduction Coefficient) -
A measure of sound absorbed by a material. The single number
designation represents the average of the sound absorption
coefficients of a material at 250 Hz, 500 Hz, 1000 Hz,
and 2000 Hz rounded to the nearest 0.05 when tested in
accordance with ASTM C 423. Acoustical performance is Classified
by Underwriters Laboratories Inc.
CAC (Ceiling Attenuation Class) -
A measure of reduction in sound transmission via plenum
path between two rooms determined in accordance with
ASTM E 1414, and plotting decibel reduction (transmission
loss) obtained at 16 frequencies against a standard reference
curve, in accordance with ASTM E 413. Acoustical performance
is Classified by Underwriters Laboratories Inc.
AC (Articulation Class) -
A measure of the sound reflective characteristics of
an acoustical material when used in conjunction with
partial-height space dividers determined in accordance
with ASTM E IIII and calculated in accordance with ASTM
E IIIO for each nominal interzone distance.
LR (Light Reflectance) -
The number designation indicating the percentage of light
reflected from a ceiling product’s surface, in
accordance with ASTM E 1477.
PlastiGard™ (PG) -
An optional acrylic finish providing a scrubbable/washable
surface. Available for use on specific products. Consult
your CertainTeed sales representative for details.
BioShield™ -
Antimicrobial mold and mildew guard. An optional treatment
that resists the surface growth of mold and mildew. Available
for use on specific products. Consult your CertainTeed sales
representative for details. |
