Anechoic Chamber
NRC's anechoic chamber is a key facility for acoustics testing. The chamber is "dead silent". The fibreglass wedges (beige, in image) that completely line the chamber's interior absorb all sound and make it anechoic — without echo. To insulate the chamber from outside noise, it sits on top of springs inside a cinder-block shell that is inside another building. The result is an environment with a background noise level below the threshold of human hearing, zero decibels. The chamber has been instrumental in the development of Canadian loudspeakers, hearing aids and microphone arrays. |
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