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
Accredited labs
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DIN EN IEC 60255-1
VDE 0435-300
DIN EN 60255-151
VDE 0435-3151
IEC 60255-151
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Intertek Caleb Brett GERMANY
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DIN EN ISO 12185
ASTM D 4052
DIN EN ISO 3405
ASTM D 86
DIN EN 13016-1
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Intertek Consumer Goods
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IEC 62321-2
DIN EN 61340-4-4
DIN EN 12472
DIN EN 16711-1
DIN EN 1264-5
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Intertek Deutschland
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IEC 61000-3-2: 2014
IEC 61000-3-3
IEC 61000-3-11: 2017
IEC 61000-3-12: 2011
IEC 61000-4-2: 2008
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Intertek Polychemlab
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DIN EN ISO 10675-1
DIN EN ISO 19458
DIN EN ISO 179-1
NEN 6953
DIN EN ISO 10675-2
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Intona
Active
and Appx. 3 of HSG 227 (2004))
Executive guides HSG 264 (2012)
(HSG 264, 2012)
Isserstedt Prüfmaschinen
Active
Härte* 20 HRA
Härtevergleichsplatten
20 HRB
20 HRC
40 HRD
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J B-Monitor
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(HSG 248) – 2021
No 1 based on HSG 248 – 2021
(PCM) based on HSG 248 – 2021
No 3 based on HSG 248 – 2021
(PCM) based on HSG 248
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JCS Technology
Active
ISO 178
BS 5350:Part C13
BS 2782 Part 10 Method 1005
BS EN ISO 14125
MIL-STD 810G:2008 Method 501.5
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UNE 320001
ISO/IEC 18045
ISO/IEC 15408
CEM ISO
ISO/IEC 24759
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Charpy impact test (ISO 148-1)
Salt spray / neutral salt fog test (ISO
elektronische Waagen
Innen- und Tiefenmaße
Konventioneller
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Javer Labs
Active
MIL-STD-810G, Method 508:7
BS 2011:2.1 Ca:1977
(IEC 60068-2-10:2005+A1:2018,
MIL-STD-810H, Method 508:8
Ebenheitsabweichung
verkörperungen z.B.
platten nach DIN 876:1984
Geradheitsabweichung
ebener Flächen, z.B.
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Johnson and Allen
Active
DC CURRENT
INSPECTION EQUIPMENT
AC CURRENT 50 Hz RMS
uncertainties may be increased.
Johs. Boss
Active
Außengewinde
Flankendurchmesser 3 mm bis 100 mm
0,5 mm bis 6 mm)
unsymmetrischem Profil
schiedlichen Ausgabeständen gestattet.
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MIL-PRF-46103E
DIN EN ISO 15106-3
DIN EN ISO 1522
DIN EN ISO 1523
ISO 16935:2007
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CD45 Percp+CD16+56+CD3
CD4
CD45 Percp+CD4+CD8
Adalimumab
Anti-Adalimumab Antikörper
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KB Prüftechnik
Active
Härteprüfmaschinen nach 100 HBW
Brinell- und
226 HBW
messeinrichtungen von
Härteprüfmaschinen
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basophile, eosinophile, Granulozyten
Differenzialblutbild
Erythrozyten
Erythrozytenverteilungsbreite
(RDW)
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KRIWAN Testzentrum
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
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KROMSCHROEDER
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Caudal m3/h 0,010 m3/h Q 250 m3/h 0,
Caudal m3/h 0,16 m3/h Q 2500 m3/h 0,
Kapraun Prüfdienst
Active
Railway brake — magnetic track brakes (U
− Ebenheit
− Geradheit
− Winkelnormale
auch als Vor-Ort-Kalibrierung
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IEH
Active
DIN EN 60034-15
VDE 0530-15
IEC 60034-15
DIN EN 60044-7
VDE 0414-44-7
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