Anechoic Chamber

Anechoic Chamber

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Caption: Historic image of an anechoic chamber. Accurate acoustical measurments require a room that is free from noise and reflecting surfaces, just as precise optical tests require a space that is free from extraneous light and reflections. This was the reason for the construction of the Bell Laboratories Free Space Room, a 38 by 28 by 45 foot enclosure in which the absence of noise and freedom from reflecting surfaces simulates the acoustical conditions of unobstructed, unconfined free space.

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