Scope
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
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DIN EN ISO 4871
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BS EN ISO 4871
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NF EN ISO 4871
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UNI EN ISO 4871
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UNE EN ISO 4871
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NEN EN ISO 4871
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DIN EN ISO 11201
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BS EN ISO 11201
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NF EN ISO 11201
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UNI EN ISO 11201
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UNE EN ISO 11201
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NEN EN ISO 11201
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Obligat anaerobe Bakterien
Grampositive aerobe und
anaerobe Kokken
Enterokokken
Mikrokokken
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automatische Zelldifferenzierung
Erythrozyten
Leukozyten
Retikulozyten
Thrombozyten
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Melutec Metrology
Active
Parallelendmaße * 0,5 mm
DIN EN ISO 3650:1999
Parallelendmaße
> 100 mm
Messschieber für Außen-, 0 mm
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Meridian Technical Services
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BS EN 14876:2007/Internal proceduresDiss
BS EN ISO 18119:2018+A1:2021
BS EN ISO 22434:2011
BS EN ISO 10460:2018
BS EN ISO 13769:2018
tungsten carbide)
Plain ring gauges (taper)
Straight edges
LENGTH (cont’d)
Squares
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Metrolution
Active
Metrosoft CM, Software einer Raumdiagona
AG, Chur, CH ≤ 3333 mm
Oberkochen, D
GmbH, Wetzlar, D
AG, Chur, CH ≤ 7500 mm
Mettler-Toledo
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Flüssigkeitsvolumen *
Kolbenhubpipetten
Manuell betätigte
spritzen
Mehrfachdispenser
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MeßTechnikNord
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- Gleichspannung
Messverstärker > 120 mV
> 1 V
> 12 V
> 1000 V
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Micro Precision (Midlands)
Active
LENGTH
Caliper
Depth BS 6468: 2008, 0 to 300
Depth
Dial gauges and dial
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Microtech Gefell
Active
Akustische Messgrößen
Messmikrofone nach
(DIN EN 61094-4:1996)
Schalldruckpegel (Druck)
Empfangsübertragungsmaß
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Microtech Services (Wessex)
Active
ISO 7251
# = 100 A
ISO 6888-3
1) A:2b based on ISO 4833-2:2013 Amd 1:2
2) A:6c based on ISO 21528-1:2017 by mos
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Mimete Srl Unipersonale
Active
ASTM B212-21
ASTM E1019-24
ASTM B527-24
BS EN ISO 3923-1
ASTM B417-22
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Minebea Intec Bovenden
Active
Konventioneller
Wägewert/
Massenormale
Charpy impact test (ISO 148-1)
Salt spray / neutral salt fog test (ISO
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Bacillus cereus Toxin
Clostridium perfringens
Salmonella spp.
Shigella spp.
Staphylococcus aureus Toxin
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ETSI EN 319 412
ETSI EN 319 401
ETSI EN 319 411-2
ETSI EN 319 411-1
Ministry of Defence
Active
Specific Values
Specific values (continued)
ELECTRICAL
Other Values
AC CURRENT
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Mitutoyo Deutschland
Active
Parallelendmaße 0,5 mm
DIN EN ISO 3650:1999
Parallelendmaße
> 10 mm
Parallelendmaße > 100 mm
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Mobiler Kalibrierdienst Fini
Active
Gleichspannung 3 mV
Messgeräte 10 mV
> 100 mV
> 220 mV
> 11 V
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IEC 61000-4-7
IEC 61000-4-15
IEC 61000-4-30
IEC 61400-21
IEC 61400-21-1
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Temperatur 50 °C
Railway brake handbooks (UIC 547)
1) In den CMC sind die erweiterten Messu
Moorcroft Controls
Active
DC CURRENT
Gas pressure (gauge)
ELECTRICAL
DC VOLTAGE
Measurement
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IEC 61000-4-2: 2008
VDE 0847-4-2
IEC 61000-4-3: 2006
VDE 0847-4-3
IEC 61000-4-4: 2012
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