ISO 2969:1987

Specified are characteristics of the B-chain response of motion-picture studio dubbing theatres, review rooms and indoor theatres. They are intended to assist in the standardization of recording monitor and reproduction characteristics of the motion-picture sound in rooms with volumes of at least 150 m3. Not included are conditions where the recorded sound is intended for reproduction in domestic surroundings, i. e. radio and television broadcasting, tape and disk.