Scope
ISO 3381:2013 / EN ISO 3381
Railway Interior Noise Measurement
ISO 3381 specifies standardized measurement procedures for determining sound pressure levels inside railbound passenger and freight vehicles under operating conditions. This test assesses passenger comfort, crew exposure, and compliance with occupational and environmental noise limits within train cabins and compartments. Manufacturers, operators, and occupational health consultants use these measurements to evaluate cabin acoustic quality, design noise control improvements, and ensure regulatory compliance. Accreditation guarantees consistent, defensible interior noise assessments that support both passenger safety and worker health protection.
What it measures
- A-weighted sound pressure level inside vehicle (dB(A))
- Noise levels at driver/operator positions
- Frequency analysis of interior noise (1/3 octave bands)
- Sound exposure level during typical operation
- Noise at passenger seating areas
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DIN EN ISO 3095
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BS EN ISO 3095
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NF EN ISO 3095
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UNI EN ISO 3095
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UNE EN ISO 3095
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NEN EN ISO 3095
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DIN EN ISO 14837-1
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BS EN ISO 14837-1
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NF EN ISO 14837-1
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UNI EN ISO 14837-1
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UNE EN ISO 14837-1
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NEN EN ISO 14837-1
1,273
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Tru-Cal Metrology
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Tyneside Standards
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Micrometers
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length bars) – See Note 5
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FNED142 BS EN ISO 11816-
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FNES16 (F13) based on BS EN
ISO 6579-1
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UL International (UK)
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DIN EN 12209
DIN EN 1155
DIN EN 12179
DIN EN 1935
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UL VS
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(HSG 264, 2012)
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ACoP L8 and BS 8580-1:2019
Uniper Technologies
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DIN EN 13284-1
BS EN ISO 23210:2009
requirements of BS EN 14181:2014
IEC 60519-11
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University of Salford
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DIN EN 12667
ISO 8301
DIN EN 12939
DIN EN 12664
DIN EN ISO 13163
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University of Salford
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BS EN ISO 10140-2:2021
DIN EN ISO 11654
ISO 354
ISO 7171
ASTM E90-09(2016)
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ASB/10 based on HSG 248
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ASB/6 based on HSG 248
BS EN ISO 14644-1:2015
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VWR International
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parameters and ranges)
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Vintec Laboratories
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(HSG 248) – 2021
(PCM) based on HSG 248
P052 based on HSG 248
WSP UK
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(HSG 248) – 2021
AFC based on HSG 248
(PCM) based on HSG 248
SSA based on HSG 248
Wessex Power Technology
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TEMPERATURE
controllers, and recorders)
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Analysts’ Guide (HSG 248)
(PCM) based on HSG 248
staining based on HSG 248
(HSG 248) – 2021
SOP 12 based on HSG 248
(PCM) based on HSG 248
SOP 11 based on HSG 248
Westward Laboratories
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ISO 21528-2
BS ISO 4832:2006
BS ISO 16649-2:2001
Method No 2.9 based on BS EN ISO
Method No 2.12 based on BS EN
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Wil-Test Solutions
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BS 1377-2:2022
BS 1377-9:1990
DIN EN 1097-5
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Winkhaus (UK)
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DIN EN 12046-2
DIN EN 12094-8
DIN EN 949
BS 6375-2:2009
DIN EN 950
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i2 FAST
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BS 4401-1:1998 Using
N008-1 based on BS EN
ISO 12966-4 2015
N008-2 based on BS EN
N011 based on BS 4401-9:1975 and BS 770-
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ifp-labs UK West Yorkshire
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on BS 4401:Part 3:1970(1986)
ISO 12966-1:2014 and
ISO 12966-4
CH 4026 based on BS 5766:Part
CH 4001 based on BS EN 12014-
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