ISO 21727:2016
Current
The latest, up-to-date edition.
Cinematography — Method of measurement of perceived loudness of short duration motion-picture audio material
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English
25-04-2016
ISO 21727:2016 specifies a method of measurement of short duration 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, typically commercials and trailers that do not exceed 3 min in length, with suitable channel summation, frequency weighting and time integration. It does not specify a maximum recommended level for such material and is solely aimed at describing a measurement method.
NOTE Typical recording and replay levels are discussed in Annex A.
| DevelopmentNote |
Supersedes ISO/DIS 21727. (04/2016)
|
| DocumentType |
Standard
|
| Pages |
6
|
| PublisherName |
International Organization for Standardization
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| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| NEN ISO 21727 : 2016 | Identical |
| UNI ISO 21727:2018 | Identical |
| IEC 61672-2:2013+AMD1:2017 CSV | Electroacoustics - Sound level meters - Part 2: Pattern evaluation tests |
| ISO 2969:2015 | Cinematography — B-chain electro-acoustic reponse of motion-picture control rooms and indoor theatres — Specifications and measurements |
| ISO 22234:2005 | Cinematography — Relative and absolute sound pressure levels for motion-picture multi-channel sound systems — Measurement methods and levels applicable to analog photographic film audio, digital photographic film audio and D-cinema audio |
| IEC 61260:1995 | Electroacoustics - Octave-band and fractional-octave-band filters |
| BS 5550-7.4.2:2000 | Cinematography. Production and presentation. Sound Specification for maximum recording levels for commercials and trailers - Subsection 7.4.2: Sound - Specification for maximum recording levels for commercials and trailers. |
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