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  • ISO 21727:2016

    Current The latest, up-to-date edition.

    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

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    Abstract - (Show below) - (Hide below)

    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.

    General Product Information - (Show below) - (Hide below)

    Development Note Supersedes ISO/DIS 21727. (04/2016)
    Document Type Standard
    Publisher International Organization for Standardization
    Status Current
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    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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