Anechoic chambers, Absorber-Lined Chambers (ALC), are shielded rooms equipped with high-frequency absorbers
in which RF oscillations are totally absorbed. To achieve such total absorption
, anechoic chambersare equipped with damping and absorption devices that completely absorb electromagnetic energy
. Anechoicemissions and immunity. Antennas, their characteristics and radiation patterns can also be measured in them, as well as RF components, microwave ovens and other RF and microwave equipment and their electromagnetic compatibility (EMC). Since the room has perfect RF tightness, the test results are not affected by any external RF signals, but only by those emitted by the equipment under test.