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AS ISO 532.2:2019

Current

Current

The latest, up-to-date edition.

Acoustics - Methods for calculating loudness Moore-Glasberg method

Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

09-04-2019

€77.79
Excluding VAT

The objective of this Standard is to specify 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.

Committee
EV-010
DocumentType
Standard
ISBN
978 1 76072 425 2
Pages
28
PublisherName
Standards Australia
Status
Current
Supersedes

This document 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 this document 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 this document.

Standards Relationship
ISO 532-2:2017 Identical

First published as AS 3657.2-1996.
Revised and redesignated as AS ISO 532.2:2019.

IEC 61672-1:2013 Electroacoustics - Sound level meters - Part 1: Specifications
ISO 532:1975 Acoustics Method for calculating loudness level
ISO 9612:2009 Acoustics Determination of occupational noise exposure Engineering method
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
ISO 3740:2019 Acoustics — Determination of sound power levels of noise sources — Guidelines for the use of basic standards
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)
ISO 1996-1:2016 Acoustics Description, measurement and assessment of environmental noise Part 1: Basic quantities and assessment procedures
ISO 226:2003 Acoustics — Normal equal-loudness-level contours
IEC 60050-702:1992 International Electrotechnical Vocabulary (IEV) - Part 702: Oscillations, signals and related devices
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
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 80000-8:2007 Quantities and units Part 8: Acoustics
ANSI/ASA S3.4 : 2007 PROCEDURE FOR THE COMPUTATION OF LOUDNESS OF STEADY SOUNDS
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

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