The anechoic chamber we use is situated on the campus of Loughborough University and is used for all our acoustics and vibration measurements.
The chamber is built as a double-shell system. It is acoustically isolated from the rest of the building and from the adjacent reverberation chamber by an air gap, while being supported on vibration isolation mounts. The inner wall consists of concrete, at least 230mm thick and the outer wall is brickwork. The inner room is mounted on VIBREX OMEGA springs and has a wire mesh floor for bringing in larger test objects.
The walls, ceiling and floor of the Anechoic Chamber are lined with glass-fibre wedges (G+H ASONAD) that provide sound absorption at frequencies above 100 Hz and thus prevent sound reflection from the room boundaries, so that free-field conditions hold.
The Reverberation Chamber is the inner shell of a double-shell building structure that is made of concrete.