ISO 9612:2009

Occupational Noise Exposure Measurement

This standard specifies methods for measuring and assessing noise exposure of workers in occupational environments to determine compliance with exposure limits and identify hearing protection needs. The measurement protocols account for temporal variations in noise and worker movement to characterize daily noise exposure levels. Results are critical for occupational health and safety compliance, hearing loss prevention programs, and workplace risk assessment. Accredited laboratories ensure measurement uncertainty, calibration standards, and data interpretation meet regulatory requirements for legal and health-safety defensibility.

What it measures

  • Equivalent continuous A-weighted sound pressure level (Leq,8h)
  • Peak sound pressure levels and impulsive noise
  • Daily noise exposure level (LEX,8h)
  • Frequency-weighted noise exposure
🇩🇪 DIN EN ISO 4871 🇬🇧 BS EN ISO 4871 🇫🇷 NF EN ISO 4871 🇮🇹 UNI EN ISO 4871 🇪🇸 UNE EN ISO 4871 🇳🇱 NEN EN ISO 4871 🇩🇪 DIN EN ISO 11201 🇬🇧 BS EN ISO 11201 🇫🇷 NF EN ISO 11201 🇮🇹 UNI EN ISO 11201 🇪🇸 UNE EN ISO 11201 🇳🇱 NEN EN ISO 11201
1,670 Accredited labs
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Laboratoire Départemental d'Analyses de la Mayenne (LDA 53)

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COFRAC 1-0674 Laval Cedex, FR
DIN EN ISO 21528-2 DIN EN ISO 6888-2 DIN ISO 16649-2 DIN ISO 11665-4 NF T90-007 + 3 more
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Laboratoire Départemental d'Analyses des Ardennes (LDA 08)

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COFRAC 1-0885 Hagnicourt, FR
NF T 90-412 DIN EN ISO 7899-1 NF U47-101 DIN EN ISO 10523 NF T90-015-2 + 3 more
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Laboratoire d'Analyses Pumonte (LA2A)

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COFRAC 1-6512 Ajaccio Cedex 9, FR
DIN EN ISO 14403-2 DIN EN ISO 13395 DIN EN ISO 10304-1 DIN EN ISO 15061 ISO 5815-1 + 3 more
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Laboratoire d'Analyses de Surveillance et d'Expertise de la Marine (LASEM) - Base Navale de Brest

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COFRAC 1-1931 Brest, FR
DIN EN ISO 17294-2 NF T 90-412 VDE 414-9-11 DIN EN ISO 10304-1 DIN EN ISO 9698 + 3 more
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Laboratoire d'Analyses des Eaux de Pays de Montbéliard Agglomération

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COFRAC 1-6554 Voujeaucourt, FR
DIN EN ISO 17294-2 NF T 90-412 DIN EN ISO 7899-1 DIN EN ISO 10304-1 ISO 5815-1 + 3 more
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Laboratoire d'Hydrologie - Environnement

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COFRAC 1-6567 Bordeaux Cedex, FR
DIN EN 27888 NF T 90-412 DIN EN ISO 7393-2 DIN EN 26461-2 DIN EN ISO 10523 + 3 more
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Laboratoire d'Olfactométrie - EGIS

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COFRAC 1-2314 Aix-En-Provence, FR
DIN EN 13725:2003-07 und Berichtigung
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Laboratoire de Contrôle des Eaux

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COFRAC 1-6404 Clermont Ferrand, FR
DIN EN ISO 17294-2 DIN EN ISO 7899-1 VDE 414-9-11 DIN EN ISO 10304-1 DIN EN ISO 10523 + 3 more
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Laboratoire de Microbiologie RD&E

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COFRAC 1-6419 Sainghin-En-Melantois, FR
DIN EN 17126 DIN EN 14562 DIN EN 14348 IEC 60127-5 DIN EN 14563 + 3 more
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LEAV

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COFRAC 1-1064 La Roche-Sur-Yon Cedex 9, FR
DIN ISO 11665-4 DIN 53483-2 DIN EN ISO 7937 NF V08-050 NF V 08-060 + 3 more
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Laboratori chimici Stante srl

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ACCREDIA 00790 Bologna, IT
ISO 12846 ISO 11348-3 DIN EN 12457-2 ISO 9377-2 ISO 19250 + 3 more
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Laboratorio Analisi BIO 5 Servizi

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ACCREDIA 00727 Castel Maggiore, IT
UNI 13649 EPA 6010 DIN EN 12880 DIN EN 13284-1 UNI 9432 + 3 more
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Laborgemeinschaft Berlin - Labor 28

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DAkkS D-ML-17159-01-00 Berlin, DE
Basophile Granulozyten Eosinophile Granulozyten Erythrozyten Hämatokrit Leukozyten + 3 more
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Laborgemeinschaft Köln

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DAkkS D-ML-18033-01-00 Köln, DE
Liste aller Untersuchungsverfahren im fl Webpräsenz des Medizinischen Laboratoriu HbA1c Basophile Basophile absolut + 3 more
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Laborgemeinschaft Odenwald

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DAkkS D-ML-18493-01-00 Darmstadt, DE
HbA1c Großes Blutbild Kleines Blutbild Retikulocyten Natriumchlorid + 3 more
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Laborärzte Sindelfingen

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DAkkS D-ML-13247-01-01 Sindelfingen, DE
Ristocetin Kofactor Aktivität Willibrand Faktors a-Hydroxy-Alprazolam Amilsulprid 7-amino-Flunitrazepam + 3 more
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Labosport

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UKAS 4098 Hucknall, GB
DIN EN 12228 DIN EN 14808 ASTM D 1177 DIN EN 12234 ISO 2549 + 3 more
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Lambda Calibration

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UKAS 0495 Chorley, GB
PRESSURE (cont’d) Distortion Factor Spot frequency Phase angle (Herpes simplex virus type + 3 more
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Lambeth Scientific Services

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UKAS 0937 Chessington, GB
(HSG 248) – 2021 (PCM) based on HSG 248 P-12 based on HSG 248
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Lancashire County Scientific Services

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UKAS 0625 Preston Riversway Docklands, GB
(HSG 248) – 2021 (PCM) based on HSG 248 ISO 12966-2 F06 6 & F06 5 based on BS EN F05 4 based on BS 770:Part + 3 more
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Landesuntersuchungsanstalt für das Gesundheits- und Veterinärwesen Sachsen

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DAkkS D-ML-18515-01-00 Dresden, DE
GPT GOT GGT Salmonellen Shigellen + 3 more
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Latzke Härteprüfung

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DAkkS D-K-19233-01-00 Wiehl, DE
Kraft (WPM) Kraftmesseinrichtungen von Werkstoffprüfmaschinen nach DIN 51220 * Acoustics — tonality assessment (DIN 456 + 3 more
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Leadec BV &

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DAkkS D-K-21171-01-01 Chemnitz, DE
Gleichspannung 33 mV Messgeräte 0,33 V 330 V Gleichstromstärke 33 µA Messgeräte 0,33 mA + 3 more
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Leftfield Environmental

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UKAS 6998 Port Talbot, GB
(HSG 264, 2012)
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Leftfield Environmental

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UKAS 4707 Port Talbot, GB
(HSG 248) – 2021 LSOP6 based on HSG 248 (PCM) based on HSG 248
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Industries

Manufacturing and industrial production Construction and heavy equipment operation Mining and quarrying operations Transportation and logistics Entertainment and live event production

Related Standards

  • ISO 4871 Acoustics — Declaration and verification of noise emission values of machinery and equipment
  • ISO 11201 Acoustics — Noise emitted by machinery and equipment — Measurement of emission sound pressure levels at a work station and at other specified positions
  • IEC 61672-1 Electroacoustics — Sound level meters — Part 1: Specifications

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