BS ISO 532-2:2017
Current
The latest, up-to-date edition.
Acoustics. Methods for calculating loudness Moore-Glasberg method
Hardcopy , PDF
English
06-07-2017
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Specifications of signals
6 Instrumentation
7 Description of the method
8 Calculation of loudness and loudness level
9 Uncertainty of calculated loudness for stationary sounds
10 Data reporting
Annex A (informative) - Comments regarding binaural
loudness
Annex B (informative) - Results for specific test signals
Annex C (informative) - Software for the calculation
of loudness
Bibliography
Describes a method for estimating the loudness and loudness level of stationary sounds as perceived by otologically normal adult persons under specific listening conditions.
| Committee |
EH/1/1
|
| DevelopmentNote |
Supersedes 16/30275393 DC. (07/2017)
|
| DocumentType |
Standard
|
| Pages |
40
|
| PublisherName |
British Standards Institution
|
| 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.
NOTE1 Issues of binaural calculations are discussed in AnnexA.
NOTE2 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.
NOTE3 It has been shown (see Reference [15]) that this method provides a good match to the contours of equal loudness level as defined in ISO226:2003 and the reference threshold of hearing as defined in ISO389‑7:2005 .
The evaluation of the harmful effect of sound events is outside the scope of this document.
| Standards | Relationship |
| ISO 532-2:2017 | Identical |
| 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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