Anechoic chamber

The anechoic chamber is a specially constructed room in which the walls, floor and ceiling are covered with sound absorbing material (mineral wool) in the form of wedges. These are effective in eliminating reflected sound. Only the direct field of the source is then measured and characteristics of the source, such as power and directivity, can be determined. Furthermore, anechoic recordings and listening tests can be carried out in the chamber. The chamber is mounted on springs that provide vibration isolation from the rest of the building.