IEC 60318-1:2009
(Main)Electroacoustics - Simulators of human head and ear - Part 1: Ear simulator for the measurement of supra-aural and circumaural earphones
Electroacoustics - Simulators of human head and ear - Part 1: Ear simulator for the measurement of supra-aural and circumaural earphones
IEC 60318-1:2009 specifies an ear simulator for the measurement of supra-aural and circumaural earphones (used for example in audiometry and telephonometry) applied to the ear without acoustical leakage, in the frequency range from 20 Hz to 10 kHz. The same device can be used as an acoustic coupler at additional frequencies up to 16 kHz. This second edition cancels and replaces the first edition published in 1998 as well as replacing IEC 60318-2, published in 1998. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- an extension of the frequency range to 16 kHz;
- a revised specification for the acoustical transfer impedance, including tolerances;
- a method for measuring the acoustical transfer impedance;
- expanded measurement uncertainties.
Electroacoustique - Simulateurs de tête et d'oreille humaines - Partie 1: Simulateur d'oreille pour la mesure des écouteurs supra-auraux et circumauraux
La CEI 60318-1:2009 donne les spécifications d'un simulateur d'oreille pour la mesure des écouteurs supra-auraux et circumauraux (utilisés, par exemple, en audiométrie et téléphonométrie) appliqués sur l'oreille sans fuite acoustique, dans le domaine de fréquence compris entre 20 Hz et 10 kHz. Le même dispositif peut être utilisé en tant que coupleur acoustique à des fréquences supplémentaires allant jusqu'à 16 kHz. Cette deuxième édition annule et remplace la première édition parue en 1998 et remplace également la CEI 60318-2, publiée en 1998. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- une extension du domaine de fréquences à 16 kHz;
- une spécification révisée pour l'impédance acoustique de transfert, y compris les tolérances;
- une méthode pour la mesure de l'impédance acoustique de transfert;
- des incertitudes de mesure élargies.
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Standards Content (Sample)
IEC 60318-1 ®
Edition 2.0 2009-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Simulators of human head and ear –
Part 1: Ear simulator for the measurement of supra-aural and circumaural
earphones
Electroacoustique – Simulateurs de tête et d'oreille humaines –
Partie 1: Simulateur d'oreille pour la mesure des écouteurs supra-auraux et
circumauraux
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IEC 60318-1 ®
Edition 2.0 2009-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Simulators of human head and ear –
Part 1: Ear simulator for the measurement of supra-aural and circumaural
earphones
Électroacoustique – Simulateurs de tête et d'oreille humaines –
Partie 1: Simulateur d'oreille pour la mesure des écouteurs supra-auraux et
circumauraux
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
T
CODE PRIX
ICS 17.140.50 ISBN 978-2-88910-120-7
– 2 – 60318-1 © IEC:2009
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Construction .7
4.1 General .7
4.2 Tolerances .9
4.3 Static pressure equalisation .10
4.4 Calibrated pressure-type microphone .10
4.5 Material .10
4.6 Measurement plane.11
4.7 Acoustic transfer impedance .11
5 Coupling of earphone to ear simulator .11
5.1 Supra-aural earphones .11
5.2 Circumaural earphones .11
6 Calibration.13
6.1 Reference environmental conditions.13
6.2 Method of calibration.13
7 Maximum permitted expanded uncertainty of measurements .13
Annex A (informative) Lumped-parameter electrical network analogue of the ear
simulator.15
Annex B (informative) Example of one specific design of ear simulator .17
Annex C (informative) Measurement method for the determination of the acoustical
transfer impedance of the ear simulator .21
Bibliography.25
Figure 1 – Schematic cross-section of the ear simulator configured for supra-aural
earphones .8
Figure 2 – Schematic cross-section of the ear simulator configured for circumaural
earphones .9
Figure A.1 – Analogue electrical network .15
Figure A.2 – Level of impedance modulus of the electrical analogue network.16
Figure A.3 – Phase of the impedance of the electrical analogue network .16
Figure B.1 – Example of one specific design of ear simulator.17
Figure B.2 – Adapter for use with circumaural earphones .18
Figure B.3 – Conical ring .19
Figure B.4 – Configuration when using the adapter and the conical ring .20
Figure C.1 – Key elements of measurement system.22
Figure C.2 – Transmitter microphone adapter to couple a transmitter microphone to the
ear simulator.23
60318-1 © IEC:2009 – 3 –
Table 1 – Specification for the acoustic transfer impedance level.12
Table 2 – Values of U for basic measurements .14
max
Table C.1 – Typical components of measurement uncertainty in the measurement of
acoustic transfer impedance .24
– 4 – 60318-1 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
SIMULATORS OF HUMAN HEAD AND EAR –
Part 1: Ear simulator for the measurement of supra-aural
and circumaural earphones
FOREWORD
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International Standard IEC 60318-1 has been prepared by IEC technical committee 29:
Electroacoustics.
This second edition cancels and replaces the first edition published in 1998 as well as
replacing IEC 60318-2, published in1998. It constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• an extension of the frequency range to 16 kHz;
• a revised specification for the acoustical transfer impedance, including tolerances;
• a method for measuring the acoustical transfer impedance;
• expanded measurement uncertainties.
60318-1 © IEC:2009 – 5 –
The text of this standard is base
...
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