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
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Microtech Services (Wessex)
Active
ISO 7251
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ISO 6888-3
1) A:2b based on ISO 4833-2:2013 Amd 1:2
2) A:6c based on ISO 21528-1:2017 by mos
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Mimete Srl Unipersonale
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ASTM B212-21
ASTM E1019-24
ASTM B527-24
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ETSI EN 319 412
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Ministry of Defence
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Specific Values
Specific values (continued)
ELECTRICAL
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AC CURRENT
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Parallelendmaße 0,5 mm
DIN EN ISO 3650:1999
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> 10 mm
Parallelendmaße > 100 mm
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Gleichspannung 3 mV
Messgeräte 10 mV
> 100 mV
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> 11 V
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Temperatur 50 °C
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IEC 61000-4-2: 2008
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(Simulation des Signals
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IEC 61000-4-2: 2008
IEC 61000-4-3: 2006
IEC 61000-4-4: 2012
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NORMEC QS
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2 V/m
2,5 V/m
1 V/m
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