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
1,868
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LUX-TSI
Active
DIN EN 13032-4
BS EN ISO 13032-1 +A1:2012
IEC 62612 ed1.0 (2013-06)
IEC 62722-1 ed1.0 (2014-09)
IEC 62722-2-1 ed1.0 (2014-11)
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Lambda Calibration
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PRESSURE (cont’d)
Distortion Factor
Spot frequency
Phase angle
(Herpes simplex virus type
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Lambeth Scientific Services
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(HSG 248) – 2021
(PCM) based on HSG 248
P-12 based on HSG 248
(HSG 248) – 2021
(PCM) based on HSG 248
ISO 12966-2
F06 6 & F06 5 based on BS EN
F05 4 based on BS 770:Part
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Leftfield Environmental
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(HSG 248) – 2021
LSOP6 based on HSG 248
(PCM) based on HSG 248
Life Environmental Services
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(HSG 248) – 2021
QSOP 01 based on HSG 248
(PCM) based on HSG 248
QSOP 03 based on HSG 248
accordance with (EN ISO 14644-
BS EN ISO 14644-1:2015
London Borough of Enfield
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staining based on HSG 248
(HSG 248) – 2021
(PCM) based on HSG 248
London Laboratories
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(HSG 248) – 2021
ASB04 based on HSG 248
(PCM) based on HSG 248
Lucideon
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DIN EN 772-13
DIN EN 1052-2
DIN EN 772-20
DIN EN 772-14
DIN EN 1052-4
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Lucion Services
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staining based on HSG 248
(HSG 248) – 2021
(PCM) based on HSG 248
3492, ISO14966 and HSG 248
DIN EN 14629
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M E Broadstone Limited
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Plain ring gauges (taper)
Plain gap gauges (parallel)
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LENGTH
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MP Calibration Services
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Plain plug gauges (parallel)
length bars)
LENGTH (continued)
Micrometers
(enzephalomyopathische Form
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MS Laboratories
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on BS 4401:Part 3:1970(1986)
ISO 936:1998
BS ISO 21528-2:2017
BS ISO 16649-2:2001
ISO 6888-1
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MS Testing
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IEC 60068-2-2
BS EN 60945, section 8.2.
ISO 13628-6: 2006
IEC 60068-2-1
DIN EN 60068-2-30
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MSS Consulting
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(HSG 264, 2012)
Appendix 5 of HSG 227 (2004)
Appendix 3 of HSG 227 (2004)
(HSG 248) – 2021
(PCM) based on HSG 248
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Marfleet Microbiology
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ISO 6579-1
ISO 21528-2
ISO 16649-2
TP/007 based on BS ISO
ISO 11290-2
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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
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