Anechoic chamber

An anechoic chamber is a room in which there are no echoes. This description was originally used in the context of acoustic (sound) echoes caused by reflections from the internal surfaces of the room but more recently the same description has been adopted for the radio frequency (RF) anechoic chamber. An RF anechoic chamber is designed to suppress the electromagnetic wave analogy of echoes: reflected electromagnetic waves, again from the internal surfaces. Both types of chamber are normally constructed, not only with echo suppression features, but also with effective isolation from the acoustic or RF noise present in the external environment. In a well designed acoustic or RF anechoic chamber, the equipment under test will only receive signals (whether acoustic or RF) which were emitted directly from the signal source, and not reflected from another part of the chamber.
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Noun
1. a chamber having very little reverberation
(hypernym) room

anechoic chamber
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