Abstract
This standard specifies the measurement methods and characteristic electroacoustic frequency response of the B-chain of motion-picture dubbing theaters, review rooms, and indoor theaters whose room volume exceeds 150 m3 (5297 ft3). It is intended to assist in standardization of reproduction of motionpicture sound in such rooms. It does not apply where the recorded sound is intended for reproduction under domestic listening conditions, i.e., for radio broadcasting, television broadcasting, tape, or disc. This standard does not cover that part of the motion-picture sound system from the transducer to the input terminals of the main fader, nor does it cover the electroacoustic response characteristic of motion-picture theater subbass loudspeakers (subwoofers).