NF EN ISO 9612

June 2025

Standard Current

Acoustics - Determination of occupational noise exposure - Methodology

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.

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Main informations

Collections

National standards and national normative documents

Thematics

Sécurité, QSE, Gestion des risques et SST

Publication date

June 2025

Number of pages

66 p.

Reference

NF EN ISO 9612

ICS Codes

13.140 Noise with respect to human beings

17.140.20 Noise emitted by machines and equipment

Classification index

S31-084

Print number

International kinship

ISO 9612:2025

European kinship

EN ISO 9612:2025

Sumary

Acoustics - Determination of occupational noise exposure - Methodology

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.

Replaced standards (1)

NF EN ISO 9612

May 2009

Standard Cancelled

Acoustics - Determination of occupational noise exposure - Engineering method

ISO 9612:2009 specifies an engineering method for measuring workers' exposure to noise in a working environment and calculating the noise exposure level. ISO 9612:2009 deals with A-weighted levels but is applicable also to C-weighted levels. Three different strategies for measurement are specified. The method is useful where a determination of noise exposure to engineering grade is required, e.g. 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. ISO 9612:2009 provides methods for estimating the uncertainty of the results. ISO 9612:2009 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 ISO 9612:2009 can provide useful information when defining priorities for noise control measures.

Table of contents

1 Domaine d'application
2 Références normatives
3 Termes et définitions
4 Symboles
5 Instruments
6 Méthodologie - Étapes chronologiques
7 Analyse du travail
8 Sélection des stratégies de mesure
9 Stratégie 1 - Mesurage basé sur la tâche
10 Stratégie 2 - Mesurage basé sur la fonction
11 Stratégie 3 - Mesurage sur une journée entière
12 Mesurages
13 Sources d'incertitude et d'erreur
14 Calcul des incertitudes de mesure et présentation des résultats finaux
15 Informations devant figurer dans le rapport
Annexe A Exemple de liste de contrôle permettant de s'assurer que les événements bruyants importants sont détectés au cours de l'analyse du travail
Annexe B Guide de sélection d'une stratégie de mesure
Annexe C Évaluation des incertitudes de mesure
Annexe D Exemple de calcul du niveau d'exposition quotidienne au bruit en utilisant des mesurages basés sur la tâche
Annexe E Exemple de calcul du niveau d'exposition quotidienne au bruit en utilisant des mesurages basés sur la fonction
Annexe F Échantillon de calcul du niveau d'exposition quotidienne au bruit en utilisant des mesurages sur une journée entière
Annexe G Exemple de calcul du niveau d'exposition quotidienne pour les travailleurs polyvalents
Annexe H Calcul de l'incertitude pour les niveaux de crête
Bibliographie

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