2013 • 2014 - Hunter Douglas

How Mineral Fiber or Fiberglass Ceilings combine beautiful design with great acousticsMineral Fiber / Fiberglasssound design 143NRC/CAC/ACNoise Reduction Coefficient (NRC)A measure for rating the overall sound absorption of a material when used inan enclosed architectural space such as an office, where sound is reflected atmany angles of incidence. A ceiling system with an NRC 70 is considered high performance.NRC is important in any closed space where reverberation time and noiselevels are an issue.Ceiling Attenuation Class (CAC)A measure for rating the performance of a ceiling system as a barrier to airbornesound transmission through a common plenum between adjacent closed spaces,such as offices. A ceiling system with a CAC ≤ 25 is considered low performance,whereas one with CAC ≥ 38 is high performance.CAC is important between closed spaces and from closed rooms to adjacentspaces such as corridors.Articulation Class (AC)A measure for rating the attenuation of reflected speech passing over the top ofwall partitions or furniture into the adjoining work stations. A ceiling system withAC ≤ 150 is low performance, whereas one with AC ≥ 180 is high performance.AC is important between adjacent cubicles in open plan spaces.Open Office 5,000 SF Exposed Structure(50' x 100'), 15' to deck, drywall with windows ontwo sides, commercial carpetCeilingTechLine SM 877 ARmSTRONGNo Treatment(0% Coverage)ExposedStructureNRC 0 0.90Reverberation Time (RT) 3.4 sec 0.5 secRT Improvement ref 86%SPL Reduction (dB) ref -6.0Privacy Index (60" partition height) 48% 61%Closed Office (14' x 14', drywall, carpet)CeilingDrywall Ceiling(100% Coverage)Suspended60" Below DeckNRC 0 0.70Reverberation Time (RT) 3.4 sec 0.5 secPrivacy Index 63% 98%For definitions of acoustical terms, see page 333 in this catalog.Be Sure You Get the Acoustic Values You SpecifyUL Classified Acoustics Since 1998Armstrong carries UL Classification for precise acousticalcompliance for three acoustical categories – NRC, CAC, and AC.As the industry leaders, Armstrong and UL teamed up in 1998to create this new classification to ensure more reliability inreporting and specifying product acoustical performance.This Icon identifies Armstrong UL Classified Acoustical ceilings – the assuranceof reliable performance in every ceiling panel. Be sure any panel you choose hascertified performance, or you may not get what you pay for.armstrong.com/commceilingsContinuous Optima ® Ceiling(100% Coverage)Suspended60" Below DeckContinuous Ultima ® Ceiling(100% Coverage)Suspended60" Below DeckMade in United States of America by: Fabricado in Estados Unidos por: Fabriqué aux Etats-Unis par:Armstrong World Ind., Inc. Lancaster, PA 17604HR3407-TYPE GBACOUSTICAL MATERIALContents Not Over 96 Sq. Ft.(Form A) Issue No. AG – 5377CSURFACE BURNING CHARACTERISTICSFLAME SPREAD ...................... 25SMOKE DEVELOPED ................. 50ACOUSTICAL PROPERTIESNRC 0.95 in accordance with ASTM C423AC min 190LA856211 REV.0207in accordance with ASTM E1111WHITEBLANCOBLANCBP3251AOptima ® , Square TegularHumiguard ® Plus24 in x 24 in x 1 in (nominal)610 mm x 610 mm x 25 mm (nominal)96 sq ft (8.92 m 2 )24 pieces24 piezas24 piècesThis label appears on cartons of Armstrong UL Classified acoustical ceilings. Armstrongcertifies that the material in the carton meets published values, not merely that a similarbatch of material met these values at some point in the past.9/16¨15 mm