Tested as per BS EN ISO 354: 2003 for sound absorption, noise reduction and sound attenuation.
Maximum NRC achieved with Acoustic Black fleece – NRC 0.75
Maximum NRC achieved with Acoustic Black Fleece and Rockwool
Insulation- NRC 1.00
Tested as per ASTM E1414-11a for Airborne Sound Attenuation as per ISO 10848-2.
Maximum CAC can achieved up to — 48 dB
Perforated & Sound Attenuation cover