IEC 61260-3:2016
(Main)Electroacoustics - Octave-band and fractional-octave-band filters - Part 3: Periodic tests
Electroacoustics - Octave-band and fractional-octave-band filters - Part 3: Periodic tests
IEC 61260-3:2016 describes procedures for periodic testing of octave-band and fractional-octave-band filters that were designed to conform to the class 1 or class 2 specifications given in IEC 61260-1:2014. The aim of this standard is to ensure that periodic testing is performed in a consistent manner by all laboratories. This first edition of IEC 61260-3 (together with IEC 61260-1:2014 and IEC 61260-2:2016), cancels and replaces the first edition of IEC 61260 published in 1995 and its Amendment 1 published in 2001. This edition constitutes a technical revision.
Electroacoustique - Filtres de bande d'octave et de bande d'une fraction d'octave - Partie 3: Essais périodiques
L'IEC 61260-3:2016 décrit les procédures relatives aux essais périodiques concernant les filtres de bande d'octave et les filtres de bande d'une fraction d'octave, qui ont été conçus pour satisfaire aux spécifications pour la classe 1 ou 2 données dans l'IEC 61260-1:2014. L'objectif de la présente norme est de s'assurer que les essais périodiques sont réalisés de manière cohérente par l'ensemble des laboratoires. Cette première édition de l'IEC 61260-3 (conjointement à l'IEC 61260-1:2014 et l'IEC 61260-2:2016) annule et remplace la première édition de l'IEC 61260 parue en 1995 et son Amendement 1 paru en 2001. Cette édition constitue une révision technique.
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IEC 61260-3 ®
Edition 1.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Octave-band and fractional-octave-band filters –
Part 3: Periodic tests
Électroacoustique – Filtres de bande d'octave et de bande d'une fraction
d'octave –
Partie 3: Essais périodiques
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IEC 61260-3 ®
Edition 1.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Octave-band and fractional-octave-band filters –
Part 3: Periodic tests
Électroacoustique – Filtres de bande d'octave et de bande d'une fraction
d'octave –
Partie 3: Essais périodiques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.140.50 ISBN 978-2-8322-3246-0
– 2 – IEC 61260-3:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 7
4 Submission for testing . 7
5 Conformance . 7
6 Preliminary inspection . 8
7 Power supply . 8
8 Environmental conditions . 8
9 Mandatory facilities and general requirements . 8
9.1 General . 8
9.2 Test instruments . 10
10 Test of relative attenuation at midband frequency or effective bandwidth deviation . 10
10.1 General . 10
10.2 Tests of relative attenuation at midband frequency . 10
10.3 Test of effective bandwidth deviation . 10
11 Linear operating range, measurement range, level range control and overload
indicator . 11
12 Test of lower limit of linear operating range . 12
13 Measurement of relative attenuation . 12
14 Documentation . 13
Annex A (informative) Uncertainty related to test by sinusoidal sweeps . 16
A.1 General . 16
A.2 Digitally generated signal . 16
A.3 Test signal from a signal generator . 17
A.4 Comparing measurements . 18
Annex B (informative) Test of effective bandwidth deviation with the use of an
exponential sweep – Example . 19
B.1 General . 19
B.2 Example. 19
Annex C (informative) Normalized frequencies for test of one-third-octave-band filters . 21
C.1 General . 21
C.2 Example calculation . 21
Bibliography . 23
Table 1 – Frequency parameter R and acceptance limits on relative attenuation for
fractional-octave-band filters . 13
Table C.1 – Normalized test frequencies and acceptance limits on relative attenuation
for one-third-octave-band filters . 22
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS – OCTAVE-BAND
AND FRACTIONAL-OCTAVE-BAND FILTERS –
Part 3: Periodic tests
FOREWORD
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