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
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COFRAC 1-7214 Florange, FR
NF X 43-269 NF X 43-264 DIN EN ISO 16017-2 NF X 43-257 NF X 43-267 + 1 more
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NF ISO 21438-3 NF X 43-269 NF ISO 21438-1 DIN EN ISO 16017-2 NF X 43-259 + 3 more
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COFRAC 1-7464 Bellegarde, FR
DIN EN 17126 DIN EN 13624 DIN EN 13727 DIN EN ISO 11930 DIN EN 14476 + 3 more
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COFRAC 1-6965 Meyzieu Cedex, FR
DIN EN 12102-1 DIN EN 14511-3 DIN EN 14825 DIN EN 14511-4 DIN EN ISO 3741 + 1 more
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COFRAC 1-6347 Sevres-Anxaumont, FR
NF X 43-269 NF X 43-264 NF X 43-298 NF X 43-259 NF X 43-257 + 3 more
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COFRAC 1-5606 Brussieu, FR
NF X 43-269 NF X 43-050 NF X43-269 โ€“ Annexe NF X43-050 (parties utiles de la norme) NF X43-050 (useful parts of the standard + 3 more
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COFRAC 1-0905 Arzacq-Arraziguet, FR
0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN ISO 16649-2 DIN EN ISO 6888-3 DIN ISO 11665-4 + 3 more
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COFRAC 1-0144 Quimper Cedex, FR
DIN EN ISO 21528-1 DIN EN ISO 21528-2 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN ISO 16649-2 + 3 more
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COFRAC 1-7447 Venelles, FR
NF X 43-269 ISO NF X 43-257 NF X 43-050 ISO 16000-7
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COFRAC 1-1364 Saint-Quentin-Fallavier, FR
DIN EN 14902 DIN ISO 16000-3 DIN EN ISO 16017-1 DIN EN ISO 16017-2 DIN ISO 16000-4 + 3 more
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COFRAC 1-5578 Villebon-Sur-Yvette, FR
NF T 90-412 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN EN ISO 16649-3 DIN EN ISO 6888-3 + 3 more
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COFRAC 1-5603 Petite-Foret, FR
DIN EN ISO 11546-1 prEN 16185-2 EN 15595 (hors essais au
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COFRAC 1-6507 Vandoeuvre Les Nancy, FR
NF X 43-269 NF X 43-298 DIN EN ISO 11689 NF X 43-257 NF X 43-050 + 1 more
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COFRAC 1-0876 Nanterre, FR
NF X 31-615 DIN EN ISO 7027-2 DIN EN ISO 10523 DIN EN 27888 DIN ISO 17289 + 3 more
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COFRAC 1-7202 Courbevoie, FR
DIN EN 14385 ETSI EN 301 489-1 V2.2.3 2019-11 NF X43-551 IS EN 1948-1:2006 2006 DIN EN 14789 + 3 more
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COFRAC 1-2194 Plancy L'Abbaye, FR
NF T 90-412 DIN EN ISO 7899-1 DIN EN ISO 10304-1 DIN EN 12880 ISO 5815-1 + 3 more
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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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COFRAC 1-1706 Rodez Cedex 9, FR
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 1-6770 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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COFRAC 1-6771 Florange, FR
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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COFRAC 1-7423 Chalon-Sur-Saรดne, FR
DIN EN 17387 DIN EN 13697
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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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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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