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
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NEN EN ISO 14837-1
1,516
Accredited labs
17
Countries
Showing 76–100 of 1,516 labs
UNE-EN 71-1
ISO 8124-1
ISO 8124-2
ASTM F963-17
(NM_001718: c.1-c.500)
+ 3 more
DIN EN ISO 11612
DIN EN ISO 3175-2
ISO 17493
DIN EN ISO 17227
DIN EN ISO 6330
+ 3 more
UNE-EN ISO 10545-2
UNE-EN ISO 10545-3
ASTM C373
UNE-EN ISO 10545-4
UNE-EN ISO 10545-5
+ 3 more
UNE-EN 772-11
UNE 136029
DIN 4772:1979
DIN EN 16510-2-4
DIN EN 17539
+ 3 more
ISO 5667-5
DIN EN 12457-2
ISO 18787
DIN EN ISO 6888-1
UNI 10802
+ 3 more
Gleichstromleistung
/ Messgeräte
Wirkleistung
Leistungsfaktor
- Gleichspannung
+ 3 more
IEC 15408-1
IEC 18045
IEC 18367
IEC 20543
IEC 20004
ASTM E8/E 8M
DIN EN 10002-1
DIN EN 10002-5
DIN EN ISO 6892-2
DIN EN ISO 643
+ 3 more
AVEYRON LABO
Active
DIN EN ISO 14403-2
NF V 04-407
NF T 90-412
DIN EN ISO 7899-1
DIN EN ISO 10304-1
+ 3 more
AVL DiTEST
Active
Abgasmessgeräte für
− Abgasmessgeräte für Fremdzündungsmotor
Kohlenstoffmonoxid
Kohlenstoffmonoxid CO
Kohlenstoffdioxid CO2
+ 3 more
AWE
Active
(HSG 248) – 2021
LQP007 based on HSG 248
LQP003 based on HSG 248
(PCM) based on HSG 248
the guidance of GPG 14
PERSONAL DOSE EQUIVALENT:
RESPONSE:
Absolute Calibration
Active
DC Resistance
CFH-Gen, Macula-Degeneration
DC RESISTANCE (continued)
DC VOLTAGE
DC VOLTAGE (continued)
+ 3 more
Acorn Analytical Services
Active
(HSG 248) – 2021
(PCM) based on HSG 248
staining based on HSG 248
(HSG 264, 2012)
Appendix 5 of HSG 227
ISO 11654
BS EN ISO 10140-2:2021
ISO 7171
ISO 354
BS EN ISO 10140-3:2021
+ 3 more
Sound Calibrators
Pistonphones
based:
level
Microphones
+ 2 more
DIN EN ISO 11127-6
DIN EN 13727
1) BS EN ISO 11930:2019+
2) QMIC WI 22, based on BS EN
Taupunkttemperatur
Railway braking — urban guided transport
Temperaturtransmitter
Widerstandssensor *)
–30 °C
+ 3 more
Air Surveys
Active
(HSG 248) – 2021
APP 7 based on HSG 248
(PCM) based on HSG 248
(PCM) based on HSG 248)
APP 15 based on HSG 248
+ 2 more
(HSG 248) – 2021
AEC 1 based on HSG 248
(PCM) based on HSG 248
AEC 6 based on HSG 248
Airbus Defence and Space
Active
- Gleichspannung
/ Messgeräte
1 µV
Quellen
> 1 V
+ 3 more
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