EN ISO 9612:2025

Acoustics - Determination of occupational noise exposure - Methodology (ISO 9612:2025)

This document specifies a method for measuring workers’ exposure to noise in a working environment and calculating the noise exposure level. This document deals with A-weighted levels but is applicable also to C-weighted levels. Three different strategies for measurement are specified. The method is applicable for detailed noise exposure studies or epidemiological studies of hearing damage or other adverse effects.
The measuring process requires observation and analysis of the noise exposure conditions so that the quality of the measurements can be controlled. This document provides methods for estimating the uncertainty of the results.
This document is not intended for assessment of masking of oral communication or assessment of infrasound, ultrasound and non-auditory effects of noise. It does not apply to the measurement of the noise exposure of the ear when hearing protectors are worn.
Results of the measurements performed in accordance with this document can provide useful information when defining priorities for noise control measures.

Akustik - Bestimmung der Lärmexposition am Arbeitsplatz - Methodik (ISO 9612:2025)

Dieses Dokument legt ein Verfahren fest, um die Lärmbelastung von Beschäftigten am Arbeitsplatz zu erfassen und den Lärmexpositionspegel zu berechnen. Dieses Dokument behandelt die Messung von A-bewerteten Pegeln, ist aber ebenso auf C-bewertete Pegel anwendbar. Es werden drei verschiedene Messstrategien festgelegt. Das Verfahren ist für ausführliche Studien zur Lärmexposition oder für epidemiologische Studien im Hinblick auf Gehörschäden oder andere nachteilige Auswirkungen anwendbar.
Die Durchführung der Messung erfordert die Beobachtung und Analyse der Lärmbelastungsbedingungen, so dass die Qualität der Messungen überprüft werden kann. Dieses Dokument beschreibt Verfahren zur Abschätzung der Unsicherheit der Ergebnisse.
Dieses Dokument ist nicht dafür vorgesehen, die Verdeckung von Sprache zu untersuchen oder Infraschall, Ultraschall und extraaurale Wirkungen von Lärm zu beurteilen. Es ist nicht geeignet, um die Lärmbelastung des durch Gehörschutz geschützten Ohres zu messen.
Die Ergebnisse der Messungen, die in Übereinstimmung mit diesem Dokument durchgeführt wurden, können nützliche Informationen für die Festlegung von Prioritäten bei Lärmminderungsmaßnahmen liefern.

Acoustique - Détermination de l'exposition au bruit en milieu de travail - Méthodologie (ISO 9612:2025)

Le présent document spécifie une méthode permettant de mesurer l’exposition au bruit des travailleurs dans un environnement de travail et de calculer le niveau d’exposition au bruit. Il traite des niveaux pondérés A, mais est également applicable aux niveaux pondérés C. Trois stratégies de mesure différentes sont spécifiées. La méthode s’applique pour des études détaillées d’exposition au bruit ou pour des études épidémiologiques relatives à une détérioration de l’audition ou d’autres effets nocifs.
Le processus de mesure requiert une observation et une analyse des conditions d’exposition au bruit permettant le contrôle de la qualité des mesurages. Le présent document fournit des méthodes permettant d’estimer l’incertitude des résultats.
Le présent document n’est pas destiné à l’évaluation du masquage de la communication parlée ni à l’évaluation des effets des infrasons, des ultrasons et des effets non auditifs du bruit. Il ne s’applique pas au mesurage de l’exposition au bruit de l’oreille quand des protecteurs individuels contre le bruit sont portés.
Les résultats des mesurages effectués conformément au présent document peuvent fournir des informations utiles lors de la définition des priorités en matière de moyens de contrôle du bruit.

Akustika - Določanje izpostavljenosti hrupu v delovnem okolju - Metodologija (ISO/FDIS 9612:2023)

General Information

• Status: Published
• Publication Date: 03-Jun-2025
• ICS: 13.140 - Noise with respect to human beings
• Technical Committee: CEN/TC 211 - Acuostics
• Drafting Committee: CEN/TC 211 - Acuostics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 04-Jun-2025
• Completion Date: 04-Jun-2025
• Ref Project: kSIST FprEN ISO 9612:2024 - Acoustics - Determination of occupational noise exposure - Methodology (ISO/FDIS 9612:2023)

Relations

• Replaces: EN ISO 9612:2009 - Acoustics - Determination of occupational noise exposure - Engineering method (ISO 9612:2009)
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 9612:2023
01-april-2023
Nadomešča:
SIST EN ISO 9612:2009
Akustika - Določanje izpostavljenosti hrupu v delovnem okolju - Metodologija
(ISO/DIS 9612:2023)
Acoustics - Determination of occupational noise exposure - Methodology (ISO/DIS
9612:2023)
Akustik - Bestimmung der Lärmexposition am Arbeitsplatz - Verfahren der
Genauigkeitsklasse 2 (Ingenieurverfahren) (ISO/DIS 9612:2023)
Acoustique Détermination de l'exposition au bruit en milieu de travail - Méthodologie
(ISO/DIS 9612:2023)
Ta slovenski standard je istoveten z: prEN ISO 9612
ICS:
13.140 Vpliv hrupa na ljudi Noise with respect to human
beings
oSIST prEN ISO 9612:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 9612:2023
oSIST prEN ISO 9612:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 9612
ISO/TC 43/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:
2023-01-17 2023-04-11
Acoustics — Determination of occupational noise exposure
— Methodology
ICS: 13.140
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
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BEING ACCEPTABLE FOR INDUSTRIAL,
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STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 9612:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

oSIST prEN ISO 9612:2023
ISO/DIS 9612:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 9612
ISO/TC 43/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:

Acoustics — Determination of occupational noise exposure
— Methodology
ICS: 13.140
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: [phone]
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: [e-mail]
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 9612:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022

oSIST prEN ISO 9612:2023
ISO/DIS 9612:2022(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 3
5 Instrumentation . 5
5.1 Sound level meters and personal sound exposure meters . 5
5.2 Calibrator . . 6
5.3 Periodic verification . 6
6 Methodology – Chronological steps . 6
6.1 Step 1: Work analysis . 6
6.2 Step 2: Selection of the measurement strategy . 6
6.3 Step 3: Measurements . 6
6.4 Step 4: Error handling and uncertainties . 6
6.5 Step 5: Calculation and presentation of results and uncertainty . 7
7 Work analysis .7
7.1 Introduction . 7
7.2 Defining homogeneous noise exposure groups (HEG) . 7
7.3 Determination of a nominal day . 8
8 Selection of measurement strategies.8
8.1 General . 8
8.2 Measurement strategies . 8
9 Strategy 1 – Task-based measurement . 9
9.1 Dividing the nominal day into tasks . 9
9.2 Duration of tasks . 9
9.3 Measurement of L for tasks . 10
pT,,A,eq m
9.3.1 General . 10
9.3.2 Number of measurements . 10
9.3.3 Time and duration of measurements . 10
9.3.4 Calculation of the A-weighted equivalent continuous sound pressure level . 11
9.4 Calculation of contribution from each task to daily noise exposure level . 11
9.5 Determination of daily noise exposure level . 11
10 Strategy 2 – Job based measurement .12
10.1 General .12
10.2 Measurement plan – Number, duration and distribution of measurements .12
10.3 Measurements . 13
10.4 Determination of daily noise exposure levels for workers in a homogenous
exposure group . 13
11 Strategy 3 — Full-day measurement .14
11.1 General . 14
11.2 Observing work activities and monitoring measurements . 14
11.3 Measurements . 14
11.4 Determination of daily noise exposure level . 15
12 Measurements .15
12.1 Selection of instrumentation .15
12.2 Field calibration . 15
12.3 Instrument worn by the worker . 16
12.4 Integrating-averaging sound level meter . 16
iii
oSIST prEN ISO 9612:2023
ISO/DIS 9612:2022(E)
13 Sources of uncertainty . .17
13.1 General . 17
13.2 Mechanical impacts on microphone . 18
13.3 Wind and airflows . 18
13.4 Relevance of sound contributions . 18
14 Calculation of measurement uncertainties and presentation of the final results .19
15 Information to be reported .19
Annex A (informative) Example of a checklist to ensure that significant noise events are
detected during the work analysis .21
Annex B (informative) Guide to the selection of measurement strategy .22
Annex C (normative) Evaluation of measurement uncertainties .25
Annex D (informative) An example showing calculation of daily noise exposure level using
task-based measurements .
...