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
1,516
Accredited labs
17
Countries
Showing 1,001–1,025 of 1,516 labs
DIN EN 1264-5
DIN EN 13647
DIN EN 71-10
DIN EN 50642
DIN EN ISO 14184-2
+ 3 more
UNE-EN 14363
UNE-EN 50367
UNE-EN 50317
UNE-EN 12663-1
DIN EN ISO 12185
ASTM D 4052
DIN EN ISO 3405
ASTM D 86
DIN EN 13016-1
+ 3 more
PHH Environmental (UK)
Active
HSG 227 (2004))
(HSG 264, 2012)
HSG 264 (2012) and Appx. 3 of
(HSG 248) – 2021
(PCM) based on HSG 248
PHOENIX TESTLAB
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
PID test & engineering
Active
DIN EN IEC 60068-2-38
DIN EN IEC 60068-2-11
BS ISO 9227:2022
DIN EN 60068-2-14
IEC 60068-2-60
+ 3 more
PLANCO-TEC
Active
DIN EN 12457-4
DIN EN 12579
DIN EN 13040
DIN EN ISO 10523 (C 5)
DIN EN 12880 (S 2a)
+ 3 more
Parallelendmaße aus 0,5 mm
Einstellringe aus Stahl *
nach DIN EN ISO 3650:1999
Keramik *
DIN EN ISO 3650:1999
+ 3 more
PRELEVAIR
Active
NF X 43-269
NF X 43-269 - Annexe K
NF X43-050 (parties utiles de
NF X 43-050
ISO 16000-7
PRO' AIR
Active
NF X 43-269
NF X 43-269 - Annexe K
NF X43-050 (parties utiles de
NF X 43-050
ISO 16000-7
PROCESS INSTRUMENTS (PI)
Active
DIN EN 12469
NF S 90-351
BS EN ISO 14644-1:2015
ISO 14644-3
Railway brake — magnetic track brakes (U
− Kraft (WPM)
nur Vor-Ort-Kalibrierungen
Kraft (WPM) 0,1 kN
Vibration measuring instruments — test m
+ 3 more
IEC 60730-1: 2013
DIN EN 60730-2-8
IEC 61000-6-1
DIN EN 50131-2-3
DIN EN 60730-2-9
+ 3 more
rs11887534
HABP2-Gen (c.1601G>A) rs7080536
IEC 61924-2
DIN EN ISO 1974
DIN 53121
+ 3 more
Dosimetrie
Luftkerma
5 mGy
2 mGy
100 µGy
+ 3 more
Pachmann
Active
EpCAM-positive Zellen (CD326)
EpCAM-positive Tumorsphären
EpCAM-positive Zellen
human epidermal growth
receptor 2 (Her-2/neu)
+ 2 more
Paragon Scientific
Active
Refractive Index
Capillary Viscometer Calibration
2.92 mm systems (continued)
Liquids
Density in Air at 20
+ 3 more
Particle Technology
Active
MIL-STD 810D, Method 510.2
MIL-STD 810E, Method 510.3
MIL-STD 810G:2008 Method 501.5
MIL-STD 810F, Method 510.4
MIL-STD-810H, Method 510.7
+ 3 more
Hämoglobin
Selen
Lithium
Zink
Eisen, Kupfer
+ 3 more
No matching labs found.