FREE FIELD
A sound environment in which there are no appreciable effects on SOUND PROPAGATION from obstacles, boundaries, or reflecting surfaces. Under free-field conditions, the loss of energy with distance may be predicted by the INVERSE-SQUARE LAW.
Compare: CANYON EFFECT, DIFFUSE SOUND FIELD, REFRACTION, REVERBERATION. See also: ANECHOIC CHAMBER, SIMPLE SOUND SOURCE.
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