BS 5550-3.4.9 standard is a part of the BS 5550 series that discusses the specification for reproduction characteristics of the A-chain frequency response for 35mm photographic sound for cinematography. Cinematography sets and supports the overall look and mood of a film's visual narrative.
BS 5550-3.4.9 specifies the A-chain electrical frequency response characteristic for photographic sound reproduction in motion-picture control rooms and indoor theatres. It is intended, in conjunction with ISO 2969, to assist in the standardization of recording monitor and reproduction characteristics of motion-picture sound dubbing theatres, review rooms and indoor theatres.
BS 5550-3.4.9 covers part of the motion-picture sound system from the transducer to the input terminals of the main fader.
BS 5550-3.4.9 on cinematography applies to:
Cinematography sets and supports the overall look and mood of a film's visual narrative. Each visual element that appears on screen, can serve and enhance the story so it is the cinematographer's responsibility to ensure that every element is cohesive and support the story.
BS 5550-3.4.9 provides you with the A-chain (Transducer systems) guidance in which the A part of a motion picture sound system extends from the transducer to the input terminals of the main fader. B-chain (final chain) in which the B part of a motion picture reproduction system extends from the input terminals of the main fader to the listening area of the room or auditorium.
BS 5550-3.4.9 exemplifies the required specification for the reproduction of the A chain frequency response for 35mm photographic sound for cinematography.