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Acoustic Curtain 4B for Acoustic Absorption, black, composed of two external layers of fireproof fabric Loneta Duero 200g and fireproof acoustic felt on the inside. It is highly resistant to ageing and acts against four elements: light, sound, temperature and fire.
– FR Rating: CLASS 1 (EN 13773:2003).
ACOUSTIC CURTAIN 4B
Sound Absorbing curtain of great durability that acts against light, sound, temperature and fire.
LIGHT – OPACITY: The light opacity properties of Acoustic Curtain 4B are due to the nature of the materials used in its sheets, in particular their density and thickness.
SOUND – ACOUSTIC ABSORPTION: The sound absorption and attenuation properties of Acoustic Curtain 4B are due to the nature of the materials used in its sheets, in particular their density, flexibility and porosity. Tested according to EN ISO 354:2004 standard, they absorb mora than 90% of sound and insulate 9dB.
TEMPERATURE – THERMAL INSULATION: The Acoustic Curtain 4B has thermal insulation properties thanks to the low thermal conductivity and resistance to air flow of the materials of the sheets that compose it.
FIRE – REACTION TO FIRE: Acoustic Curtain 4B is classified as Class-1 according to EN 13773:2003.
Composition:
External fabric: felt of 25 kg/m3 with 10-12 mm of thickness.
Acoustic isolation
Single curtain DnT,W(C,Ctr)=8 (1.-1)
Double curtain DnT,W(C,Ctr)=15 (0.-3)
Absorption coefficient αmid= 0.98; αw=0.90.
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