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
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COFRAC 1-7441 Le Vesinet, FR
NF S92-501 (mars
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COFRAC 1-1080 Ennery, FR
NF-T 90-029 ISO 5815-1 NF T 90-043 NF-T 90-101 NF T90-004 + 3 more
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ASTM E8/E 8M DIN EN 10002-1 DIN EN 10002-5 DIN EN ISO 6892-2 DIN EN ISO 643 + 3 more
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DIN EN ISO 14403-2 NF V 04-407 NF T 90-412 DIN EN ISO 7899-1 DIN EN ISO 10304-1 + 3 more
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COFRAC 1-6573 Bagnols Sur Ceze, FR
NF X43-050 (parties utiles de NF X 43-050 NF X 43-269 –
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COFRAC 1-6770 Grande Synthe, FR
DIN EN ISO 6507-1 DIN EN ISO 6508-1 NF T90-111 EN 13087-2 DIN EN 10325 + 3 more
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DIN EN ISO 6508-1 NF T90-111 EN 13087-2 ISO 15705 DIN EN ISO 10523 + 3 more
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COFRAC 1-7109 Anglet, FR
NF X 43-259 NF X 43-257 NF X 43-264 NF X 43-267
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COFRAC 1-6582 Mertzwiller, FR
DIN EN 12102-1 DIN EN 14825 DIN EN 14511-3 DIN EN 12102-2 DIN EN 14511-4 + 3 more
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BIOXAL

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COFRAC 1-7423 Chalon-Sur-Saône, FR
DIN EN 17387 DIN EN 13697
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COFRAC 1-6232 Nantes, FR
NF X 43-269 NF X 43-269 - Annexe K NF X43-050 (parties utiles de NF X 43-050 ISO 16000-7
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COFRAC 1-0973 Sevres, FR
NF X 43-269 NF X 43-050 ISO 22262-1 NF X 43-269 - Annexe K NF X 43-298 + 3 more
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COFRAC 1-7426 Sautron, FR
DIN EN ISO 10523 NF X 31-615 (prélèvements purge
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COFRAC 1-7368 Courbevoie, FR
NF X43-551 DIN 16961-2 DIN EN 14790 AG2 and IS EN 15259:2007 DIN EN 14181 + 3 more
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COFRAC 1-5812 Moulins, FR
DIN ISO 17289 DIN EN ISO 10523 DIN EN 27888 NF X 31-615 (Uniquement
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COFRAC 1-6594 Rennes, FR
NF T 90-412 DIN EN ISO 7899-1 DIN ISO 11465 ISO 5815-1 DIN EN ISO 9308-2 + 3 more
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COFRAC 1-0793 Perpignan, FR
DIN EN ISO 17294-2 DIN EN ISO 14403-2 DIN EN ISO 13395 VDE 414-9-11 DIN EN ISO 10304-1 + 3 more
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CARASOL

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COFRAC 1-6996 Santeny, FR
NF T90-004 NF-T 90-029
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COFRAC 1-0736 St Paul Lez Durance Cedex, FR
ASTM E181 – 17 ASTM E 1297
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COFRAC 1-7313 Fretin, FR
NF X 43-269 NF X 43-050 NF X43-050 (2021)* (parties
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COFRAC 1-1695 Cestas, FR
DIN EN 13486 IEC ISO 1496-2 – Conteneurs DIN EN 16440-1
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COFRAC 1-1861 Rungis, FR
DIN EN 12390-6 DIN EN 196-2 DIN EN 62196-1: 2015 DIN EN 12390-3 ISO 13320 + 3 more
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COFRAC 1-0301 Marne La Vallee Cedex 2, FR
NF P 92-501 NF P92-512 EN 13823 EN ISO 1716 NF P 92-504 + 3 more
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COFRAC 1-0552 Grenoble Cedex 09, FR
BS EN ISO 1924-2:2008 DIN EN ISO 1974 DIN EN 12758 BS EN ISO 12625-4:2022 ISO 535 + 3 more
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COFRAC 1-0979 Bobigny, FR
NF X 31-615 (Uniquement NF X 43-257 NF X 43-259 DIN EN 27888 DIN EN ISO 10523 + 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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