2015ISO 2969:2015 Cinematography - B-chain electro-acoustic reponse of motion-picture control rooms and indoor theatres - Specifications and measurements
1987ISO 2969:1987 Cinematography; B-chain electro-acoustic reponse of motion-picture control rooms and indoor theatres; Specifications and measurements
1977ISO 2969:1977 Cinematography — Electro-acoustic response of motion-picture control rooms and indoor theatres — Specifications and measurements