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
🇮🇹
UNI EN ISO 14837-1
🇪🇸
UNE EN ISO 14837-1
🇳🇱
NEN EN ISO 14837-1
1,273
Accredited labs
15
Countries
Showing 1,001–1,025 of 1,273 labs
Technische Universität München Institut für Medizinische Mikrobiologie, Immunologie und Hygiene
Active
Staphylokokken
Treponema pallidum (Cardiolipin
Antikörper)
Legionella spp.
Salmonellen, Shigellen, Yersinia
+ 3 more
TechnoTeam Bildverarbeitung
Active
& 2: 2008
Leuchtdichte L /
vom Typ L3 Standard
Normfarbwertanteile x , y /
LED-basierte Farb- und
+ 3 more
Taupunkttemperatur
Railway braking — urban guided transport
Widerstandssensor
–40 °C bis
> 5 °C bis
+ 3 more
Gleichspannung 0 mV
Messgeräte 10 mV
Wechselspannung 0,22 mV
> 220 mV
> 2,2 V
+ 3 more
Test-Fuchs, Fritz Fuchs Gesellschaft mit beschränkter Haftung Kalibrierlaboratorium Deutschland
Active
Positiver Überdruck p e
> 70 bar
Überdruck p
(ein- oder mehrgängige
Testo Industrial Services
Active
- Gleichspannung
/ Messgeräte
Quellen
Hochspannung
- Gleichstromstärke
+ 3 more
Testo Industrial Services
Active
RELATIVE HUMIDITY
HUMIDITY continued
loggers
Gas Pressure Gauge
Saturated salt capsules
+ 2 more
Testzentrum Baden
Active
DIN EN 60068-2-67
UNE-EN 60068-2-52
IEC/EN 60068-2-38:2009 Part 2-38:
ISO 16750-4
DIN EN 60529
+ 3 more
Tetra Tech Consulting
Active
(HSG 248) – 2021
RPSCA1 based on HSG 248
(PCM) based on HSG 248
RPSCA2 based on HSG 248
BS 7592:2008, BS 8554:2015
+ 2 more
TetraTec Instruments
Active
Railway brakes — disc brake pads (UIC 54
Volumendurchfluss bzw.
0,01 m
Railway pantographs — requirements for m
39 mL/h
+ 3 more
The Auditing Company
Active
#EN ISO 5164:14
# EN 116-97
# ISO 13736
NEN 4400-1
#ISO 6618
(HSG 248) – 2021
03 based on HSG 248)
QOP01 based on HSG 248
(PCM) based on HSG 248
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
Thermo Electron LED
Active
- Gleichspannung
Messgeräte 0,001 V bis
0,33 V bis
3,3 V bis
330 V bis
+ 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
Masse oder
Konventioneller
Wägewert/
Massenormal *)
> 1 mg
+ 3 more
Railway brake — magnetic track brakes (U
Kraft (WPM)
Länge (WPM)
a) nur Vor-Ort-Kalibrierungen
Vickers hardness test (ISO 6507)
+ 3 more
No matching labs found.