IEC 61252:1993

IEC 61252 ®
Edition 1.2 2017-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
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Electroacoustics – Specifications for personal sound exposure meters

Electroacoustique – Spécifications des exposimètres acoustiques individuels

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IEC 61252 ®
Edition 1.2 2017-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electroacoustics – Specifications for personal sound exposure meters

Electroacoustique – Spécifications des exposimètres acoustiques individuels

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.140; 17.140.50 ISBN 978-2-8322-4227-8

IEC 61252 ®
Edition 1.2 2017-04
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Electroacoustics – Specifications for personal sound exposure meters

Electroacoustique – Spécifications des exposimètres acoustiques individuels

– 2 – IEC 61252:1993+AMD1:2000
+AMD2:2017  IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Definitions . 7
4 General performance requirements . 9
5 Reference conditions . 11
6 Absolute acoustical sensitivity . 11
7 Frequency weighting . 11
8 Linearity of response to steady signals . 12
9 Response to short-duration signals . 13
10 Response to unipolar pulses . 14
11 Latching overload indicator . 14
12 Sensitivity to various environments . 14
13 Instrument marking . 15
14 Instruction Manual . 15
15 Electromagnetic and electrostatic compatibility requirements and test procedures . 17
Annex A (informative)  Sound exposures and corresponding normalized 8-h-average
sound levels . 22
Annex B (informative)  Recommended tests to verify the performance of a personal
sound exposure meter . 23
Annex C (informative)  Emission limits. 27

Figure 1 – Functional elements of a personal sound exposure meter . 10

Table 1 – Design-goal A-frequency weighting relative to response at 1 kHz
and the tolerances ∆A that apply to the performance of a complete personal sound
exposure meter . 12
Table A.1 – Sound exposures and corresponding normalized 8-h-average sound levels . 22
Table B.1 – Minimum set of target conditions for 1 kHz steady-signal linearity tests . 24
Table B.2 – Conditions for testing response to short-duration signals . 25
Table C.1 – Limits for radiated disturbance of class B ITE at a measuring distance
of 10 m . 27

+AMD2:2017  IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
SPECIFICATIONS FOR PERSONAL SOUND EXPOSURE METERS
FOREWORD
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This consolidated version of the official IEC Standard and its amendments has been prepared
for user convenience.
IEC 61252 edition 1.2 contains the first edition (1993-06) [documents 29(CO)162 and
29(CO)168], its amendment 1 (2000-10) [documents 29/457/FDIS and 29/471/RVD] and its
amendment 2 (2017-04) [documents 29/910/CDV and 29/936/RVC].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendments 1 and 2. Additions are in green text, deletions are in strikethrough red
text. A separate Final version with all changes accepted is available in this publication.

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