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(tag) – acoustics

Critical Distance

Critical Distance or Dc is the distance from a sound source where the level of direct sound equals that of any reverberant sound. Dc applies to all sound gathering but measuring it is normally only required when advance planning of microphone positions is needed. Critical Distance does not dictate where a microphone must be placed…

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Sabin

A Sabin is the amount of absorption equivalent to one square metre of open window (which would allow the sound to escape from the room with no reflections). Named after American acoustician Wallace Clement Sabine (June 13, 1868 – January 10, 1919).  See also Sound Absorption Coefficients for Some Common Materials.

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