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
๐Ÿ‡ฉ๐Ÿ‡ช DIN EN ISO 4871 ๐Ÿ‡ฌ๐Ÿ‡ง BS EN ISO 4871 ๐Ÿ‡ซ๐Ÿ‡ท NF EN ISO 4871 ๐Ÿ‡ฎ๐Ÿ‡น UNI EN ISO 4871 ๐Ÿ‡ช๐Ÿ‡ธ UNE EN ISO 4871 ๐Ÿ‡ณ๐Ÿ‡ฑ NEN EN ISO 4871 ๐Ÿ‡ฉ๐Ÿ‡ช DIN EN ISO 11201 ๐Ÿ‡ฌ๐Ÿ‡ง BS EN ISO 11201 ๐Ÿ‡ซ๐Ÿ‡ท NF EN ISO 11201 ๐Ÿ‡ฎ๐Ÿ‡น UNI EN ISO 11201 ๐Ÿ‡ช๐Ÿ‡ธ UNE EN ISO 11201 ๐Ÿ‡ณ๐Ÿ‡ฑ NEN EN ISO 11201
1,868 Accredited labs
20 Countries

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COFRAC 1-0833 Mende, FR
DIN EN ISO 17294-2 DIN EN ISO 14403-2 NF T 90-412 DIN EN ISO 21528-2 DIN EN ISO 7899-1 + 3 more
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COFRAC 1-1466 Pessac Cedex, FR
NF V08-106 NF T 90-412 NF EN ISO 7887 โ€“ VDE 414-9-11 DIN EN ISO 7899-1 + 3 more
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COFRAC 1-0551 Laon Cedex, FR
DIN ISO 11466 NF X31-120 DIN EN ISO 11885 NF X31-147 DIN EN 16175-1 + 3 more
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COFRAC 1-0796 Dijon Cedex, FR
DIN EN ISO 17294-2 DIN EN ISO 14403-2 DIN EN ISO 13395 NF T 90-412 DIN EN ISO 7899-1 + 3 more
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COFRAC 1-7330 Montauban, FR
DIN EN ISO 10703 NF T 90-412 DIN EN ISO 21528-1 DIN EN ISO 7899-1 VDE 414-9-11 + 3 more
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COFRAC 1-0977 Montpellier Cedex 2, FR
DIN EN ISO 13395 DIN EN ISO 7899-1 DIN EN ISO 6888-2 ISO 5815-1 NF T90-015-1 + 3 more
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COFRAC 1-0997 Limoges, FR
ISO 5815-1 EN 13087-2 DIN EN ISO 6579-1 NF U47-108 ISO 15705 + 3 more
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COFRAC 1-1046 Les Ponts De Ce, FR
NF V08-401 DIN EN ISO 6888-2 DIN ISO 16649-2 BS ISO 15214:1998 NF V08-409 + 3 more
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COFRAC 1-1356 Gap Cedex, FR
NF V 04-155 DIN EN ISO 21528-2 DIN ISO 16649-2 DIN EN ISO 6888-2 NF V08-054 + 3 more
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COFRAC 1-1105 Serres-Castet, FR
DIN EN 10002-1 ASTM E8/E 8M ASTM A 370 NF EN ISO 6892-1 (mรฉthodes A1, A2 et DIN EN 2002-001 + 3 more
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COFRAC 1-1021 Saint Beauzire, FR
ISO 14698-1 DIN EN ISO 17141 DIN EN 12469 DIN EN ISO 11138-2 DIN EN ISO 11737-2 + 3 more
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COFRAC 1-6990 La Ciotat, FR
DIN EN 13624 DIN EN 13727 DIN EN ISO 11930 DIN EN 17387 DIN EN ISO 22717 + 3 more
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COFRAC 1-1979 Limoges, FR
NF V 04-407 DIN EN ISO 6888-1 NF V04-403 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 + 3 more
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COFRAC 1-1160 Trinite, FR
NF T 90-412 DIN EN ISO 6888-1 DIN EN ISO 7899-1 DIN EN ISO 21528-2 DIN ISO 16649-2 + 3 more
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COFRAC 1-0714 Sophia Antipolis Cedex, FR
DIN EN ISO 21528-2 DIN EN ISO 6888-2 DIN ISO 16649-2 ISO 5815-1 BS ISO 15214:1998 + 3 more
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COFRAC 1-1173 Lagor, FR
DIN EN 14385 NF U47-002 NF X43-551 ETSI EN 301 489-1 V2.2.3 2019-11 DIN EN ISO 14403-2 + 3 more
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COFRAC 1-1847 Lyon 7Eme, FR
DIN EN 10002-1 BS ISO 9227:2022 DIN EN ISO 643 EN ISO 12624 DIN EN 10045-1 + 3 more
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LABSUD7

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COFRAC 1-7045 Sete, FR
NF X 43-050 (parties utiles NF X 43-269 NF X 43-050
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COFRAC 1-1734 La Capelle, FR
DIN EN ISO 8968-1 DIN 19662 DIN EN ISO 5534 DIN EN ISO 8968-4 DIN EN ISO 5764 + 3 more
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LDA 13

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COFRAC 1-1290 Marseille Cedex 13, FR
NF V08-106 DIN EN ISO 17294-2 NF T 90-412 NF U47-105 DIN EN ISO 7899-1 + 3 more
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COFRAC 1-2193 Bourg-En-Bresse Cedex 9, FR
DIN EN ISO 17604 NF V08-401 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN ISO 16649-2 + 3 more
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LDAE 95

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COFRAC 1-1405 Cergy, FR
NF T 90-412 DIN EN ISO 7899-1 VDE 414-9-11 DIN EN ISO 10304-1 ISO 5815-1 + 3 more
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COFRAC 1-2350 Villepinte, FR
NF X 43-269 DIN 51750-3 NF X 46-032 NF EN 15934 โ€“ NF X 43-269 โ€“ Annexe K + 3 more
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LHEM

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COFRAC 1-0053 Gonfreville L'Orcher, FR
NF EN ISO 6892-1 Mรฉthode B DIN EN ISO 6508-1 ISO 4969 DIN EN 10002-1 DIN EN ISO 643 + 3 more
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LIDAL

Active
COFRAC 1-0600 Annecy, FR
NF T 90-412 DIN EN ISO 7899-1 DIN EN ISO 10304-1 DIN EN ISO 6888-2 DIN ISO 16649-2 + 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 โ€” Declaration and verification of noise emission values of machinery and equipment
  • ISO 11201 Acoustics โ€” Noise emitted by machinery and equipment โ€” Measurement of emission sound pressure levels at a work station and at other specified positions
  • IEC 61672-1 Electroacoustics โ€” Sound level meters โ€” Part 1: Specifications

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