ISO 21727:2004
Cinematography - Method of measurement of perceived loudness of motion-picture audio material
- Standard No.
- ISO 21727:2004
- Release Date
- 2004
- Published By
- International Organization for Standardization (ISO)
- Status
- Replace By
- ISO 21727:2016
- Latest
- ISO 21727:2016
- Scope
- This International Standard specifies a method of measurement of motion-picture sound that allows assessment of the subjective loudness and annoyance of the sound recording when replayed at the recommended replay level in rooms aligned with the characteristics of ISO 2969. The specified method of measurement assesses the entire duration of the sound recording with suitable channel summation, frequency weighting and time integration. NOTE Typical recording and replay levels are discussed in Annex A.
ISO 21727:2004 Referenced Document
- ISO 2969:1987 Cinematography; B-chain electro-acoustic reponse of motion-picture control rooms and indoor theatres; Specifications and measurements
ISO 21727:2004 history
- 2016 ISO 21727:2016 Cinematography - Method of measurement of perceived loudness of short duration motion-picture audio material
- 2004 ISO 21727:2004 Cinematography - Method of measurement of perceived loudness of motion-picture audio material
