free-field room

Definitions

Electronics

  • A room whose walls, ceiling, and floor are lined with sound-absorbing materials which minimize or eliminate all sound reflections. Used, for example, to test microphones or sound-level meters. Also called free field chamber, anechoic chamber (1), dead room, or echoless room.
  • synonymfree-field chamber
http://www.dictionarycentral.com/definition/free-field-room.html