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
Accredited labs
20
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Showing 351–375 of 393 labs
DC CURRENT
DC Resistance
Measurement
DC VOLTAGE
CAPACITANCE
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(HSG 248) – 2021
03 based on HSG 248)
QOP01 based on HSG 248
(PCM) based on HSG 248
The Original Gauge Company
Active
LENGTH
Screw ring gauges (parallel)
LENGTH cont.
As for Involute Spline Gauges
See Note 2
+ 3 more
The Testing Lab
Active
DIN EN 933-11
BS EN ISO 17892-1:2014+A1:2022
BS EN ISO 17892-10:2018
BS EN ISO 17892-11:2019
BS EN ISO 17892-2:2014
+ 3 more
Thomas Dudley
Active
BS 1212-2:1990 Clause 4
BS 1212-3:1990 Clause 4
DIN EN 997
Laktoseintoleranz (LCT -14055
BS 1212-4:1991 Clause 4, 13, 14
Total Clean Air
Active
ISO 14644-3
BS EN ISO 14644-2:2015:Part 2
DIN EN 12469
BS EN ISO 14644-1:2015
BS EN ISO 14644-4:2022
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Tru-Cal Metrology
Active
including dial and digital
LENGTH (cont’d)
Plain plug gauges (taper)
ANCILLARY MEASUREMENTS
Plain ring gauges (taper)
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Tyneside Standards
Active
Micrometers
See Notes 3 and 5
See Note 6
Caliper
length bars) – See Note 5
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FNED142 BS EN ISO 11816-
FNES67 (P1) based on BS EN ISO
FNES16 (F13) based on ISO 6579-1:2017+A1
FNES16 (F13) based on BS EN
ISO 6579-1
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UL International (UK)
Active
DIN EN 12209
DIN EN 1155
DIN EN 12179
DIN EN 1935
DIN EN 1670
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UL VS
Active
(HSG 264, 2012)
and Appx. 3 of HSG 227 (2004))
guides HSG 264 (2012) and
ACoP L8 and BS 8580-1:2019
Uniper Technologies
Active
DIN EN 13284-1
BS EN ISO 23210:2009
requirements of BS EN 14181:2014
IEC 60519-11
requirements of BS EN
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Chronic progressive external
LENGTH
Micrometer heads
Dial gauges and dial test
Depth
+ 3 more
University of Salford
Active
DIN EN 12667
ISO 8301
DIN EN 12939
DIN EN 12664
DIN EN ISO 13163
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University of Salford
Active
Pistonphones
Microphones
LS2/WS2 microphones
based:
Reverberation Time
University of Salford
Active
BS EN ISO 10140-2:2021
DIN EN ISO 11654
ISO 354
ISO 7171
ASTM E90-09(2016)
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