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

06-26-2017

Publisher

International Organization for Standardization

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.

DevelopmentNote	Supersedes ISO/DIS 532-2 and ISO 532. (06/2017)
DocumentType	Standard
Pages	28
ProductNote	Supersedes ISO/DIS 532-2 and ISO 532. (INDP 06/2017) This standard also refers to DIN 45631:1991.
PublisherName	International Organization for Standardization
Status	Current

Standards	Relationship
BS ISO 532-2:2017	Identical
NEN ISO 532-2 : 2017	Identical
AS ISO 532.2:2019	Identical

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)