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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NEN EN ISO 11201
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Appendix 5 of HSG 227 (2004))
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Eindringkörper für 75°
Sound system equipment — speech transmis
Länge der
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Vergrößerungsnormale Abflachung bis 300
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Durchfluss von Gasen 17 mL/s
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Strömungswiderstand 5 mL/min
15,0 mL/min
Laminar Flow Elemente 17 mL/min
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Kötter Consulting Engineers
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DIN 4150-1
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DIN EN 61400-11
ISO 9613-2
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Tiefenmessschieber 0 mm
Höhenmessschieber 0 mm
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(HSG 248) – 2021
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NF X43-050 (parties utiles de la
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NF ISO 22262-1 (parties utiles
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UNE-EN ISO 140-5
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UNE-EN ISO 140-7
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UNE-EN 17298
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DIN EN 16175-1
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