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
18 Countries

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ACUSTICAN

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ENAC LE2742 Maliaño, ES
UNE-EN 1793-5 UNE-EN 1793-6
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ENAC LE2882 Ripollet, ES
UNE-EN 60404-14 0 mT ≤ B ≤ 75,7 mT (196 ± 3) mT (990 ± 4 3 mT ≤ B ≤ 300 mT 300 mT ≤ B ≤ 1600 mT
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ENAC LE2461 Zamudio, ES
UNE-EN ISO 16283-2 UNE-EN ISO 140-7 UNE-EN ISO 3382-2 UNE-EN ISO 16283-1 UNE-EN ISO 140-4
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INNONATION

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ACCREDIA 02189 Catania, IT
ETSI EN 319 412 ETSI EN 319 401 ETSI EN 319 411-2 ETSI EN 319 411-1
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COFRAC 1-5752 Angers Cedex 01, FR
NF U47-036-1 DIN EN ISO 14403-2 NF T 90-412 NF T90-350 DIN EN ISO 7899-1 + 3 more
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COFRAC 1-7140 Nantes Cedex 3, FR
NF V 05-116 NF V 04-415 NF V 04-407 NF V04-403 NF V04-401 + 3 more
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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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DAkkS D-K-15027-01-00 Düsseldorf, DE
Plasma, Serum, Plasma 0,5 mmol/L Plasma, Serum, Plasma 50 mmol/L Plasma, Serum, Plasma Material Urin + 3 more
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COFRAC 1-1872 - | Bp 1274 Antananarivo 101 | Madagascar, MG
DIN EN ISO 7932 DIN EN ISO 22964 NF V08-059 DIN EN ISO 6579-1 NF V08-036 + 3 more
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ENAC LE1703 Madrid, ES
ISO 11731 SM 5220 UNE-EN ISO 6222 UNE-EN ISO 20236 UNE EN 27888 + 3 more
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INTA

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ENAC LC10.007 Torrejón de Ardoz, ES
ISO 16063-21 EN 55016-1-6 CEM EL-025 UNE-EN ISO 376 UNE-EN ISO 7500-1 + 3 more
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INTA

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ENAC LE1285 Torrejón de Ardoz, ES
UNE-EN ISO 10704 UNE 73350-1 UNE 73311-5 ISO 11665-4 UNE 31010 + 1 more
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ENAC LE257 Zaragoza, ES
IEC 61000-4-13: 2002 DIN EN 50121-3-2 IEC 61000-3-2: 2014 DIN EN 60601-1-2 IEC 61000-3-3 + 3 more
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ENAC LE554 Paterna, ES
IEC 61000-3-2: 2014 UNE-EN IEC 61000-3-2 UNE-EN 61000-3-2 UNE-EN IEC 61000-6-4 IEC 61000-3-3 + 3 more
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ENAC LC10.149 Madrid, ES
(380 - 780 nm) 1 < R ≤ 100 0,01< DO ≤ 0,1 0,1 < DO ≤ 0,3 1,1 < DO <
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ENAC LE1286 Bétera, ES
DIN EN 1040 DIN EN 1656 DIN EN 14561 IEC 60127-6 DIN EN 13727 + 3 more
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ENAC LC10.164 Prat de Llobregat, ES
(500 ± 50) mPa · s (12500 ± 1250) mPa ·
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ENAC LC10.091 Cabrils, ES
2 · 10-6 mol/mol  C  100 · 10-6 mol/mo
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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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DAkkS D-PL-12107-01-00 Berlin, DE
IEC 62271-1: 2017-07 DIN EN 62271-1 VDE 0671-1 IEC 62271-100: 2021 VDE 0671-100 + 3 more
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DAkkS D-PL-14160-01-01 Aschaffenburg, DE
DIN EN 1230-1 EN 1230-2 DIN 10955 DIN ISO 8784-1 DIN 54378 + 3 more
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ENAC LE1754 Torrent, ES
UNE-EN ISO 16283-1 UNE-EN ISO 16283-3 UNE-EN ISO 16283-2
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DAkkS D-PL-20393-01-00 Wiesbaden, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN EN ISO 3741 DIN EN ISO 3743-2 + 3 more
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DAkkS D-PL-18192-01-00 Oldenburg, DE
DIN 4150-1 DIN 4150-2 DIN 4150-3 DIN SPEC 45653 ISO 18406
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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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