Patent ID: 7779964

Claim:
An acoustic element panel adapted to be a visible element of a wall or ceiling having a flat, sound-receiving, front face which extends in the XY plane and which has a sound absorption coefficient of at least 0.7, a rear face substantially parallel to the front face, and side edges which extend in the Z direction between the front face and rear faces, and in which the element consist predominantly of a bonded batt of airlaid mineral fibres, characterised in that the bonded batt has a density of 70 to 200 kg/m 3 , the fibres extending from the front face and at least through the front half of the thickness of the batt have a Z direction component substantially greater than the Z direction component of fibres in airlaid products made by collecting fibres entrained in air by suction through a travelling collector and vertically compressing the collected fibres, optionally after cross-lapping the collected fibres, and the front face of the bonded batt is a cut and abraded face.