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
1,868 Accredited labs
20 Countries

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COFRAC 1-7141 Parcay Meslay, FR
DIN EN ISO 17294-2 DIN EN ISO 14403-2 NF EN ISO 7887 – NF T 90-412 DIN EN ISO 7899-1 + 3 more
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COFRAC 1-7142 Saint Ave, FR
NF V08-106 DIN EN ISO 17294-2 DIN EN ISO 21528-2 ISO 19343 NF T90-105-2 + 3 more
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COFRAC 1-7322 Ostwald Cedex, FR
(BS EN ISO 6892-1: 2019) ASTM E8/E 8M DIN EN 10002-1 ASTM E8 et E8M DIN EN 2002-001 + 3 more
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COFRAC 1-7401 Heudebouville, FR
DIN EN 12469 NF S 90-351 BS EN ISO 14644-1:2015 ISO 14644-3
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COFRAC 1-1296 Heudebouville, FR
DIN EN ISO 1833-6 DIN EN ISO 1833-2 DIN EN ISO 1833-7 DIN EN ISO 1833-1 DIN EN ISO 1833-20 + 3 more
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COFRAC 1-6304 Petit Couronne, FR
NF X43-050 (parties utiles de ISO 22262-1 NF X 43-050 NF X 43-269 - Annexe K
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COFRAC 1-0101 Ecully Cedex, FR
DIN EN ISO 14419 DIN EN ISO 14045 DIN EN ISO 3071 DIN EN ISO 13934-1 NF EN 14325 (2004) – norme annulée + 3 more
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COFRAC 1-5970 Saint-Gregoire, FR
ISO 22262-1 NF X 43-050 NF X43-050 (parties utiles de la
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COFRAC 1-6090 Brest, FR
ISO 22262-1 NF X 43-050 NF X 43-269 – NF X43-050 (parties
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COFRAC 1-6585 Sainte Marie, FR
ISO 22262-1 NF X 43-050 NF X 43-269 – NF X43-050 (parties utiles de
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COFRAC 1-5971 Villeneuve D'Ascq, FR
NF X 43-269 DIN EN ISO 16017-1 NF X 43-007 NF X 46-032 NF X 43-298 + 3 more
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COFRAC 1-6091 Metz, FR
NF X 43-269 DIN EN ISO 16017-1 NF X 43-007 NF X 43-298 NF X43-050 (parties utiles de + 3 more
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COFRAC 1-1029 Meyreuil, FR
NF X 43-269 DIN EN ISO 16017-1 NF X 43-298 NF X 46-032 ISO 22262-1 + 3 more
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COFRAC 1-5968 Merignac, FR
NF X 43-269 DIN EN ISO 16017-1 NF X43-269 – Annexe NF X 43-007 NF X 43-298 + 3 more
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COFRAC 1-1761 Saint Etienne, FR
NF X 43-269 NF X 43-007 NF X 46-032 NF X 43-014 NF X 43-259 + 3 more
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COFRAC 1-5967 Saint-Gregoire Cedex, FR
NF X 43-269 EN 13087-2 DIN EN ISO 16017-1 NF X 43-007 DIN EN ISO 16017-2 + 3 more
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KALITEO

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COFRAC 1-5835 Gasny, FR
DIN EN 27888 NF X 31-615 (Uniquement DIN EN ISO 10523
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L3A LAB

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COFRAC 1-0978 Malakoff, FR
NF X 43-050 NF X 43-269 - Annexe K NF X43-050 (parties utiles de
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COFRAC 1-6752 Ivry Sur Seine, FR
NF X43-050 (parties utiles de la NF X 43-050 NF ISO 22262-1 (parties utiles
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COFRAC 1-7014 Plouzane, FR
DIN EN 13346 CEN / TS 14235 NF T 90-412 DIN EN ISO 7899-1 DIN EN 12880 + 3 more
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COFRAC 1-7015 Ploufragan, FR
NF U47-210 NF U47-036-1 NF U47-108 NF U47-100 NF U47-107 + 3 more
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COFRAC 1-1828 Quimper Cedex, FR
DIN EN ISO 21528-1 DIN EN ISO 21528-2 DIN EN ISO 10304-1 DIN EN ISO 6888-2 NF V08-054 + 3 more
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COFRAC 1-6099 Strasbourg Cedex, FR
ISO 5815-1 DIN ISO 15923-1 EN 13087-2 DIN EN ISO 7887 DIN EN ISO 13395 + 3 more
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COFRAC 1-1951 Rennes Cedex, FR
DIN EN ISO 14403-2 NF T 90-412 DIN EN ISO 7899-1 NF EN ISO 7887 – méthode C ISO 5815-1 + 3 more
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COFRAC 1-0871 Coulounieix-Chamiers, FR
DIN EN ISO 17294-2 DIN EN ISO 14403-2 DIN EN ISO 10304-1 NF-T 90-101 NF T90-015-1 + 3 more
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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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