kSIST FprEN IEC 61252:2025
(Main)Electroacoustics - Personal sound exposure meters
Electroacoustics - Personal sound exposure meters
IEC 61252:2025 specifies
– performance specifications for personal sound exposure meters,
– details of the tests necessary to verify conformance to all mandatory specifications for the purpose of pattern evaluation, and
– procedures for periodic testing of a personal sound exposure meter.
Personal sound exposure meters conforming to the requirements of this document have a specified frequency response for sound incident on the microphone from all directions.
This document is applicable to instruments that are designed to be worn on a person in a configuration specified by the manufacturer for the measurement of sound immission resulting from steady, intermittent, fluctuating, irregular, or impulsive sounds. For reproducibility of results, specifications and tests for the response to sound waves apply without an operator present in the sound field.
Pattern evaluation tests and periodic tests described in this this document apply to personal sound exposure meters for which the manufacturer claims conformance to the specifications given in this document.
IEC 61252:2025 cancels and replaces the first edition published in 1993, Amendment 1:2000, and Amendment 2:2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) personal sound exposure meters are required to provide indications of time-averaged sound level and peak sound level;
b) sound exposure is an optional quantity for indication;
c) specifications for physical quantities that do not follow the principle of equal-energy exchange rate have been added;
d) specifications for directional response have been added;
e) specifications for frequency weightings apply to the relative diffuse-field frequency response;
f) determination of conformance to specifications takes account of uncertainties of measurement;
g) detailed requirements for pattern-evaluation tests and periodic testing have been added.
Elektroakustik - Anforderungen an Personenschallexposimeter
électroacoustique - Exposimètres acoustiques individuels
L'IEC 61252:2025 spécifie
– les performances des exposimètres acoustiques individuels;
– les détails des essais nécessaires pour vérifier la conformité à toutes les spécifications obligatoires aux fins de l'évaluation de modèle; et
– les procédures d'essais périodiques d'un exposimètre acoustique individuel.
Les exposimètres acoustiques individuels conformes aux exigences du présent document ont une réponse en fréquence spécifiée pour le niveau sonore incident sur le microphone dans toutes les directions.
Le présent document s'applique aux instruments conçus pour être portés par une personne dans une configuration spécifiée par le fabricant pour mesurer l'exposition sonore qui résulte de sons permanents, intermittents, fluctuants, irréguliers ou impulsifs. Pour la reproductibilité des résultats, les spécifications et les essais de la réponse aux ondes sonores s'appliquent sans opérateur présent dans le champ acoustique.
Les essais d'évaluation de modèle et les essais périodiques décrits dans le présent document s'appliquent aux exposimètres acoustiques individuels pour lesquels le fabricant revendique la conformité aux spécifications données dans le présent document.
L'IEC 61252:2025 annule et remplace la première édition parue en 1993, l'Amendement 1:2000 et l'Amendement 2:2017. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) les exposimètres acoustiques individuels doivent fournir des indications du niveau équivalent continu de pression acoustique et du niveau sonore de crête;
b) l'exposition au bruit est une grandeur dont l'indication est facultative;
c) les spécifications des grandeurs physiques qui ne respectent pas le principe d'un taux de conversion d'énergie égale ont été ajoutées;
d) les spécifications de la réponse directionnelle ont été ajoutées;
e) les spécifications des pondérations fréquentielles s'appliquent à la réponse en fréquence en champ diffus relative;
f) la détermination de la conformité aux spécifications tient compte des incertitudes de mesure;
g) les exigences détaillées des essais d'évaluation de modèle et des essais périodiques ont été ajoutées.
Elektroakustika - Merilniki osebne izpostavljenosti zvoku
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 61252:2024
01-september-2024
Elektroakustika - Merilniki osebne izpostavljenosti zvoku
Electroacoustics - Personal sound exposure meters
Elektroakustik - Anforderungen an Personenschallexposimeter
électroacoustique - Exposimètres acoustiques individuels
Ta slovenski standard je istoveten z: prEN IEC 61252:2024
ICS:
13.140 Vpliv hrupa na ljudi Noise with respect to human
beings
17.140.50 Elektroakustika Electroacoustics
oSIST prEN IEC 61252:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN IEC 61252:2024
oSIST prEN IEC 61252:2024
29/1180/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61252 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-08-02 2024-10-25
SUPERSEDES DOCUMENTS:
29/1153/CD, 29/1157A/CC
IEC TC 29 : ELECTROACOUSTICS
SECRETARIAT: SECRETARY:
Denmark Ms Lise Aagesen
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Electroacoustics - Personal sound exposure meters
PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
At its meeting April 2024 in Warsaw, IEC/TC 29 took the following decision, doc. 29/1174/DL, refers:
DECISION 1
TC 29 decides to proceed with 2CD IEC 61252 "Electroacoustics – Personal sound exposure meters"
as a CDV with the following target dates:
CDV: 2024-08-31
FDIS: 2025-08-31
Publication: 2025-11-30.
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
oSIST prEN IEC 61252:2024
IEC CDV 61252 © IEC 2024 – 2 – 29/1180/CDV
2 CONTENTS
3 FOREWORD. 5
4 INTRODUCTION . 7
5 1 Scope . 8
6 2 Normative references . 9
7 3 Terms and definitions . 9
8 4 Performance specifications . 13
9 4.1 General performance requirements . 13
10 4.1.1 Components . 13
11 4.1.2 Display device . 14
12 4.1.3 Configuration . 14
13 4.1.4 Design features . 15
14 4.1.5 Adjustment at the calibration check frequency . 16
15 4.1.6 Determination of conformance . 17
16 4.1.7 Reference environmental conditions . 17
17 4.1.8 Classification for radio-frequency tests . 17
18 4.2 Marking . 18
19 4.3 Static pressure . 18
20 4.4 Temperature . 18
21 4.5 Relative humidity . 18
22 4.6 Electrostatic discharge . 18
23 4.7 A.C.-power-frequency and radio-frequency fields . 18
24 4.8 Radio-frequency emissions and disturbances to a public power supply . 19
25 4.9 Directional response . 19
26 4.10 Frequency weightings. 19
27 4.11 Corrections to indicated levels . 20
28 4.11.1 General . 20
29 4.11.2 Windscreens . 20
30 4.11.3 Corrections for use during periodic testing . 21
31 4.12 Linearity of response to steady signals . 21
32 4.13 Under-range indication . 21
33 4.14 Time-weightings F and S . 21
34 4.15 Response to short duration signals for indications of time-averaged sound
35 levels, sound exposure levels, and time-weighted sound levels . 21
36 4.16 Response to short duration signals for indications of time-averaged non-
37 equal-energy sound levels . 22
38 4.17 Overload indication . 23
39 4.18 C-weighted peak sound level . 23
40 4.18.1 Deviation from reference differences . 23
41 4.18.2 Repeatability . 23
42 4.19 Stability during continuous operation . 23
43 4.20 High-level stability . 23
44 4.21 Reset facility . 23
45 4.22 Analogue or digital output . 23
46 4.23 Timing facilities . 23
47 4.24 Crosstalk . 24
48 4.25 Power supply . 24
49 4.26 Pause and resumption of time averaging and time integration . 24
50 4.27 Instruction Manual . 24
oSIST prEN IEC 61252:2024
IEC CDV 61252 © IEC 2024 – 3 – 29/1180/CDV
51 4.27.1 General . 24
52 4.27.2 Specifications . 24
53 4.27.3 Information for operation . 26
54 4.27.4 Information for use with auxiliary devices . 27
55 4.27.5 Information for testing . 27
56 5 Pattern-evaluation tests . 28
57 5.1 General requirements . 28
58 5.1.1 Submission for testing . 28
59 5.1.2 Display device . 29
60 5.1.3 Configuration . 29
61 5.1.4 Design features . 29
62 5.1.5 Adjustment at the calibration check frequency . 30
63 5.1.6 Determination of conformance . 30
64 5.1.7 Environmental conditions . 31
65 5.1.8 Laboratory equipment . 31
66 5.2 Marking and information in the Instruction Manual . 31
67 5.3 Static pressure . 32
68 5.4 Temperature . 32
69 5.5 Relative humidity . 32
70 5.6 Electrostatic discharge . 32
71 5.7 Influence of a.c-power-frequency and radio-frequency fields . 32
72 5.8 Radio-frequency emissions and public power supply disturbances . 32
73 5.9 Directional response . 32
74 5.10 Frequency weightings. 32
75 5.10.1 Acoustical signal tests of frequency weightings . 32
76 5.10.2 Electrical signal tests of frequency weightings . 32
77 5.11 Corrections to indicated levels . 33
78 5.12 Linearity of response to steady signals . 33
79 5.13 Under-range indication . 33
80 5.14 Decay time constants for time weightings F and S . 33
81 5.15 Response to short-duration signals for indications of time-averaged sound
82 levels, sound exposure levels, and time-weighted sound levels . 33
83 5.16 Response to short-duration signals for indications of time-averaged non-
84 equal-energy sound levels . 33
85 5.17 Overload indication . 34
86 5.18 C-weighted peak sound level . 34
87 5.18.1 Deviation from reference differences . 34
88 5.18.2 Repeatability . 34
89 5.19 Stability during continuous operation . 34
90 5.20 High-level stability . 34
91 5.21 Reset facility . 34
92 5.22 Outputs . 35
93 5.23 Timing facilities . 35
94 5.24 Crosstalk in multi-channel personal sound exposure meters . 35
95 5.25 Power supply . 35
96 5.26 Pause and resumption of time averaging and time integration . 35
97 5.27 Pattern evaluation report . 35
98 6 Periodic tests . 36
99 6.1 General requirements . 36
100 6.1.1 Submission for testing . 3
...
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