Anechoic Chamber impact on Sounds

Murray Hill Anechoic Chamber


Yigal Bejerano, David Estes-Smargiassi and Brian Voyer.


  • The name "anechoic" literally means "without echo".
  • Built in 1940 - The world's oldest wedge-based anechoic chamber.
  • Interior room - 30 feet high by 28 feet wide by 32 feet deep.
  • The exterior brick walls are 3 feet thick to reduce outside noise.
  • Large fiberglass wedges mounted on the interior surfaces of the chamber absorb echoes or reflections.
  • The chamber absorbs over 99.995% of the incident acoustic energy above 200 Hz.
  • The anechoic chamber has been used for psychoacoustic work relating to loudness.
  • At one time the Murray Hill chamber was cited in the Guinness Book of World Records as the world's quietest room.
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