* Test report, panel with LAUDESCHER 301 acoustic fleece and LAUDESCHER 301 acoustic fleece + 45 mm MW or SW
** Moist and/or corrosive environments, cf. grid system manufacturer recommendations
Sound absorption has been measured as defined in standard ISO 354. Data related to sound absorption (αp, αw, absorption class) has been calculated in compliance with standard ISO 11654 (LAUDESCHER LINEA + addition of acoustic materials).
LAUDESCHER LINEA SWELL ceiling, LAUDESCHER 201 acoustic fleece on 400 mm plenum + MW or SW
Weighted index: αw = 0.65
Absorption class: Class C
According to ASTM C423: NRC = 0.65