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  • ISO 532-2:2017

    Current The latest, up-to-date edition.

    Acoustics — Methods for calculating loudness — Part 2: Moore-Glasberg method

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English

    Published date:  26-06-2017

    Publisher:  International Organization for Standardization

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    Abstract - (Show below) - (Hide below)

    ISO 532-2:2017 specifies a method for estimating the loudness and loudness level of stationary sounds as perceived by otologically normal adult persons under specific listening conditions. It provides an algorithm for the calculation of monaural or binaural loudness for sounds recorded using a single microphone, using a head and torso simulator, or for sounds presented via earphones. The method is based on the Moore-Glasberg algorithm.

    NOTE 1 Issues of binaural calculations are discussed in Annex A.

    NOTE 2 Users who wish to study the details of the calculation method can review or implement the source code, which is entirely informative and provided with ISO 532-2:2017 for the convenience of the user.

    This method can be applied to tones, broadband noises and complex sounds with sharp line spectral components, for example transformer hum or fan noise.

    NOTE 3 It has been shown (see Reference [15]) that this method provides a good match to the contours of equal loudness level as defined in ISO 226:2003 and the reference threshold of hearing as defined in ISO 389‑7:2005.

    The evaluation of the harmful effect of sound events is outside the scope of ISO 532-2:2017.

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

    Development Note Supersedes ISO/DIS 532-2 and ISO 532. (06/2017)
    Document Type Standard
    Product Note Supersedes ISO/DIS 532-2 and ISO 532. (INDP 06/2017) This standard also refers to DIN 45631:1991.
    Publisher International Organization for Standardization
    Status Current

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

    ISO 11200:2014 Acoustics Noise emitted by machinery and equipment Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions
    IEC 60050-702:1992 International Electrotechnical Vocabulary (IEV) - Part 702: Oscillations, signals and related devices
    ISO 389-7:2005 Acoustics Reference zero for the calibration of audiometric equipment Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions
    ISO 3740:2000 Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards
    ISO 80000-8:2007 Quantities and units Part 8: Acoustics
    ISO 532:1975 Acoustics Method for calculating loudness level
    ISO 1996-1:2016 Acoustics Description, measurement and assessment of environmental noise Part 1: Basic quantities and assessment procedures
    ISO 9612:2009 Acoustics Determination of occupational noise exposure Engineering method
    IEC 61260-1:2014 Electroacoustics - Octave-band and fractional-octave-band filters - Part 1: Specifications
    ISO 11904-1:2002 Acoustics — Determination of sound immission from sound sources placed close to the ear — Part 1: Technique using a microphone in a real ear (MIRE technique)
    IEC TS 60318-7:2017 Electroacoustics - Simulators of human head and ear - Part 7: Head and torso simulator for the measurement of air-conduction hearing aids
    ISO 226:2003 Acoustics — Normal equal-loudness-level contours
    ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
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