Cinematography — Method of measurement of perceived loudness of short duration motion-picture audio material

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

25-04-2016

Publisher

International Organization for Standardization

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
Status	Current
Supersedes	ISO 21727:2004

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.