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
🇫🇷
NF EN ISO 14837-1
🇮🇹
UNI EN ISO 14837-1
🇪🇸
UNE EN ISO 14837-1
🇳🇱
NEN EN ISO 14837-1
1,273
Accredited labs
15
Countries
Showing 326–350 of 1,273 labs
(HSG 248) – 2021
(PCM) based on HSG 248
based on BS EN 12457
DIN EN 1948-4
dbSNP rs1800562, rs1799945, rs1800730, r
(HSG 264, 2012)
HSG 227 (2004))
(HSG 248) – 2021
(PCM) based on HSG 248
DIN EN 1303
DIN EN 12209
DIN EN 14846
BS 3621:2007+A2:2012
BS 8621:2007+A2:2012
+ 3 more
Element Metech KDK
Active
Elektrische Messgrößen
Gleichstrom- und Niederfrequenzmessgröße
Railway brake — magnetic track brakes (U
− Gleichspannung
− Gleichstromstärke
+ 3 more
Elster
Active
Durchfluss von Gasen 0,5 m³/h
Volumendurchfluss
> 4 m³/h
Railway overhead lines — pantograph head
> 10 m³/h
+ 3 more
DIN EN ISO 14607
DIN EN 13687-2
DIN EN ISO 15912
ASTM E290-22
DIN EN ISO 19023
+ 3 more
Endress+Hauser SE+
Active
IEC 61000-4-2: 2008
IEC 61000-4-3: 2006
IEC 61000-4-4: 2012
IEC 61000-4-5: 2005
IEC 61000-4-6: 2013
+ 3 more
Enquin Environmental
Active
(HSG 248) – 2021
(Section 2) based on HSG 248
(Section 4) based on HSG 248
staining based on HSG 248
(HSG 264, 2012)
+ 3 more
CDC73
(NM_000384: c.1-c.82)
ID152
EN ISO 11925-2
DIN EN 350
+ 3 more
Enviraz Surveys
Active
HSG 264 (2012) and Appx. 3 of
(HSG 264, 2012)
HSG 227 (2004))
Appendix 5 of HSG 227 (2004))
Envirocare Midlands
Active
(HSG 248) – 2021
SOP/11, based on HSG 248
(PCM) based on HSG 248
(HSG 248) – 2021
DIN EN 12457-2
3.02 based on HSG 248
staining based on HSG 248.
(PCM) based on HSG 248
Environmental Essentials
Active
(HSG 248) – 2021
TP003 based on HSG 248
(PCM) based on HSG 248
TP002 based on HSG 248
Appendix 5 of HSG 227 (2004)
+ 1 more
Environmental Services
Active
(HSG 248) – 2021
(PCM) based on HSG 248
SP1 based on HSG 248
(HSG 264, 2012)
and Appx. 3 of HSG 227 (2004))
Executive guides HSG 264 (2012)
Envirosafe Testing
Active
(HSG 248) – 2021
SOP 3 based on HSG 248
(PCM) based on HSG 248
Innen- und Tiefenmaße
Konventioneller
0,11 G
> 2 G
> 5 g
+ 3 more
Essex Asbestos Testing
Active
(HSG 248) – 2021
(PCM) based on HSG 248
TP03 based on HSG 248
Eton Environmental Group
Active
(HSG 248) – 2021
TP005, based on HSG 248
(PCM) based on HSG 248
No matching labs found.