EN 62458:2011
(Main)Sound system equipment - Electroacoustic transducers - Measurement of large signal parameters
Sound system equipment - Electroacoustic transducers - Measurement of large signal parameters
IEC 62458:2010(E) applies to transducers such as loudspeaker drive units, loudspeaker systems, headphones, micro-speakers, shakers and other actuators using either an electro-dynamical or electro-magnetic motor coupled with a mechanical suspension. The large signal behaviour of the transducer is modelled by a lumped parameter model considering dominant nonlinearities such as force factor, stiffness and inductance. It defines the basic terms and parameters of the model, the methods of measurements and the way the results should be reported. It cancels and replaces IEC/PAS 62458 published in 2006. It constitutes a technical revision. The main changes are: - descriptions of the methods of measurement are adjusted to the state of the technology; - addition of Clauses 4 to 15; - integration of Annex A in the main body of the standard; - overall textual review.
Elektroakustische Geräte - Elektroakustische Wandler - Messung von Großsignal-Parametern
Equipements pour systèmes électroacoustiques - Transducteurs électroacoustiques - Mesure des paramètres en grand signal
L'IEC 62458:2010 s'applique aux transducteurs tels que les unités motrices de haut-parleurs, les systèmes de haut-parleurs, les casques, les micro-haut-parleurs, les vibrateurs et autres actionneurs qui utilisent un moteur électrodynamique ou électromagnétique couplé à une suspension mécanique. Le comportement des signaux forts du transducteur est modélisé par un modèle de paramètres localisés qui tient compte des non-linéarités dominantes telles que le facteur de force, la rigidité et l'inductance, comme cela est représenté à la Figure 1. Cette norme définit les termes et paramètres de base du modèle, ainsi que les méthodes de mesurage et la manière dont il convient de consigner les résultats. L'IEC 62458:2010 annule et remplace l'IEC/PAS 62458 parue en 2006. Elle constitue une révision technique. Les principales modifications sont les suivantes: - la description des méthodes de mesurage a été adaptée à l'état de la technologie; - les Articles 4 à 15 ont été ajoutés; - l'Annexe A a été intégrée au corps de la norme; - le texte a été revu dans son intégralité.
Oprema zvokovnega sistema - Elektroakustični pretvorniki - Meritve parametrov velikih signalov (IEC 62458:2010)
Ta mednarodni standarda velja za pretvornike, kot so pogonske enote zvočnikov, sistemi zvočnikov, naglavne slušalke, mikrozvočniki, stresalniki in drugi aktivatorji, ki uporabljajo ali elektrodinamične ali elektromagnetne motorje, povezane z mehanskimi obesami. Vedenje velikih signalov pretvornikov je modelirano kot model ločenih parametrov ob upoštevanju dominantne nelinearnosti, kot so dejavnik sile, togost in induktivnost, prikazani na sliki 1. Ta standard določa osnovne izraze in parametre modela, metode merjenja in način, kako naj bodo rezultati prikazani.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2011
2SUHPD]YRNRYQHJDVLVWHPD(OHNWURDNXVWLþQLSUHWYRUQLNL0HULWYHSDUDPHWURY
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Sound system equipment - Electroacoustic transducers - Measurement of large signal
parameters (IEC 62458:2010)
Elektroakustische Geräte - Elektroakustische Wandler - Messung von Großsignal-
Parametern (IEC 62458:2010)
Equipements pour systèmes électroacoustiques - Transducteurs électroacoustiques -
Mesure des paramètres en grand signal (CEI 62458:2010)
Ta slovenski standard je istoveten z: EN 62458:2011
ICS:
33.160.50 Pribor Accessories
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 62458
NORME EUROPÉENNE
March 2011
EUROPÄISCHE NORM
ICS 33.160.50
English version
Sound system equipment -
Electroacoustic transducers -
Measurement of large signal parameters
(IEC 62458:2010)
Equipements pour systèmes Elektroakustische Geräte -
électroacoustiques - Elektroakustische Wandler -
Transducteurs électroacoustiques - Messung von Großsignal-Parametern
Mesure des paramètres en grand signal (IEC 62458:2010)
(CEI 62458:2010)
This European Standard was approved by CENELEC on 2011-01-02. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62458:2011 E
Foreword
The text of document 100/1624/FDIS, future edition 1 of IEC 62458, prepared by IEC/TC 100, Audio,
video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 62458 on 2011-01-02.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2011-10-02
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-01-02
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62458:2010 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 62458:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60268-1 - Sound system equipment - HD 483.1 S2 -
Part 1: General
IEC 60268-5 2003 Sound system equipment - EN 60268-5 2003
A1 2007 Part 5: Loudspeakers A1 2009
IEC 62458 ®
Edition 1.0 2010-01
INTERNATIONAL
STANDARD
colour
inside
Sound system equipment – Electroacoustical transducers – Measurement of
large signal parameters
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
T
ICS 33.160.50 ISBN 978-2-88910-733-9
– 2 – 62458 © IEC:2010(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms and definitions .7
4 Test signals.9
4.1 General .9
4.2 Large d.c. signal.9
4.3 Large d.c. signal and small a.c. signal.9
4.4 Broadband noise signal .9
4.5 Music .9
5 Mounting condition .10
5.1 Drive units.10
5.2 Loudspeaker systems.10
6 Climatic conditions .10
7 Acoustical environment .10
8 Preconditioning .10
9 Time-varying properties of the loudspeaker .11
10 Methods of measurement .11
10.1 General .11
10.2 Static or quasi-static method .11
10.3 Point-by-point dynamic method .12
10.4 Full dynamic method .14
11 Nonlinear force factor .15
11.1 Force factor curve Bl(x) .15
11.2 Force-factor limited displacement, X .16
Bl
11.3 Symmetry point, x (x ).17
sym ac
11.4 Voice coil offset, x .18
offset
12 Nonlinear stiffness.18
12.1 Nonlinear stiffness curve K (x) .18
ms
12.2 Compliance-limited displacement x .19
C
12.3 Stiffness asymmetry A (x ).19
peak
K
13 Displacement-dependent inductance, L (x).20
e
13.1 Inductance curve L (x) .20
e
13.2 Inductance-limited displacement, x .21
L
14 Current -dependent inductance, L (i).21
e
14.1 Characteristic to be specified .21
14.2 Method of measurement .21
15 Parameters derived from geometry and performance.22
15.1 Maximal peak displacement, x .22
MAXd
15.2 Method of measurement .22
Bibliography.23
Figure 1 – Electro-dynamical transducer .7
62458 © IEC:2010(E) – 3 –
Figure 2 –Static and quasi-static measurement setup .12
Figure 3 – Setup for measurement of large signal parameters by using the point-by-
point dynamic method.13
Figure 4 – Setup for dynamic measurement of large signal parameters.14
Figure 5 – Reading the maximal peak displacement x limited by force factor only .16
B
Figure 6 – Reading the voice coil offset from the symmetry point x (x ) curve.17
sym ac
Figure 7 – Definition of the symmetry point x in the nonlinear force factor
sym
characteristic Bl(x) .18
Figure 8 – Reading the stiffness asymmetry from the K (x) curve .20
ms
– 4 – 62458 © IEC:2010(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SOUND SYSTEM EQUIPMENT –
ELECTROACOUSTICAL TRANSDUCERS –
MEASUREMENT OF LARGE SIGNAL PARAMETERS
FOREWORD
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8) Attention is drawn to the Normative reference
...
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