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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UKAS 7691 Shotton, GB
(HSG 248) – 2021 NSDOC 47 based on HSG 248 staining based on HSG 248. (PCM) based on HSG 248
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UKAS 8998 Portadown, GB
(HSG 248) – 2021 SOP-12, based on HSG 248 staining based on HSG 248 (PCM) based on HSG 248
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UKAS 0573 Thurso, GB
AIR KERMA RATE AMBIENT DOSE HBs-Antigen (Hepatitis B-Surface RESPONSE: PERSONEL DOSE
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UKAS 0282 Harlow, GB
(HSG 264, 2012) Appendix 5 of HSG 227 (2004) (HSG 248) – 2021 (PCM) based on HSG 248
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ENAC LE2316 Pozuelo de Alarcón, ES
UNE-EN 14385 UNE-EN 15259 UNE-EN 13211 BS ISO 9096:2017 UNE 77216 + 3 more
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COFRAC 1-1964 Cesson-Sevigne, FR
DIN EN 13725:2003-07 und Berichtigung
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OHEC (uk)

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UKAS 0394 Prestwich, GB
(HSG 264, 2012) Appendix 5 of HSG 227 (2004))
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OHS

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UKAS 21882 Manchester, GB
(HSG 264, 2012)
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DAkkS D-K-15218-01-00 Friedrichsdorf (Taunus), DE
Druck 0,03 bar Absolutdruck Pabs > -0,3 bar > 3,0 bar > −0,02 bar + 3 more
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DAkkS D-K-20427-01-00 Lörrach, DE
− Wärmezähler Durchflusssensoren als Teilgeräte von Wärme- und Kältezählern: + 3 more
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COFRAC 1-5873 Bessines-Sur-Gartempe, FR
DIN EN ISO 11731 2019-03 EN 13087-2 NF T 90-043 NF-T 90-101 NF T90-015-1 + 3 more
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COFRAC 1-5809 Bruay La Buissiere, FR
DIN EN 27888 NF X 31-615 (Uniquement DIN EN ISO 10523
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DAkkS D-PL-12032-01-02 Hüllhorst, DE
IEC 61000-4-2: 2008 VDE 0847-4-2 IEC 61000-4-3: 2006 VDE 0847-4-3 IEC 61000-4-4: 2012 + 3 more
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DAkkS D-K-15021-01-01 Aschaffenburg, DE
Railway brake — magnetic track brakes (U − Ebenheit − Geradheit − Winkelnormale auch als Vor-Ort-Kalibrierung + 3 more
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UKAS 2769 Blyth, GB
IEC 61400-23 ASTM G73 (2012) IEC 60885-3, 2.4.1 IEC 60502-2 IEC 60840 + 3 more
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RvA L403 Amsterdam, NL
DIN EN ISO 16911-1 ISO 10780 DIN EN 13725:2003-07 und Berichtigung AG2 and IS EN 15259:2007
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DAkkS D-PL-17433-01-00 Kiel, DE
DIN EN 13725:2003-07 und Berichtigung DIN ISO 16000-28 DIN EN ISO 16000-9 DIN EN ISO 16000-11 VDA 270
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Olfasense UK

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UKAS 2430 Bristol, GB
IEC 60519-11 BS EN BS EN ISO 21877:2019 DIN EN ISO 16911-1 Standard and BS EN 15259:2007 DIN EN 13126-19 + 3 more
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RvA I073 Tilburg, NL
ISO 11819-1 (N 2 O) 0,000008 DIN EN ISO 16911-1 AG2 and IS EN 15259:2007 DIN EN 14790 + 3 more
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RvA I168 Arnhem, NL
ETSI EN 301 489-1 V2.2.3 2019-11 ASTM D4157-13 BS ISO 11338-1:2003 DIN EN ISO 16911-1 NEN-EN 14791 2 + 3 more
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UKAS 2048 Avonmouth, GB
ISO 6888-1 ISO 21528-2 BS ISO 4832:2006 ISO 4833-1 ISO 6579-1 + 3 more
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DAkkS D-PL-14154-01-01 Essen, DE
ISO 6974-1 ISO 6974-2 ISO 6974-6 ISO 6975 DIN EN 12697-5 + 3 more
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UKAS 0286 Bradford, GB
DC Resistance DC CURRENT DC VOLTAGE DC RESISTANCE (cont’d)
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UKAS 4600 Kettering, GB
(HSG 264, 2012)
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DAkkS D-PL-11118-01-01 Rudolstadt, DE
DIN EN 1264-5 DIN EN 13647 DIN EN 71-10 DIN EN 50642 DIN EN ISO 14184-2 + 3 more
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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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