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
15
Countries
Showing 76–100 of 134 labs
(380 - 780 nm) 1 < R ≤ 100
0,01< DO ≤ 0,1 0,1 < DO ≤ 0,3 1,1 < DO <
DIN EN 1040
DIN EN 1656
DIN EN 14561
IEC 60127-6
DIN EN 13727
+ 3 more
CEM ME-003
EURAMET cg-17
CEM ME-010
Ground-borne noise and vibration from ra
UNE-EN ISO 16911-1
+ 3 more
UNE 320001
ISO/IEC 18045
ISO/IEC 15408
CEM ISO
ISO/IEC 24759
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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,
LABAQUA, S.A. (Unipersonal)
Active
UNE-EN ISO 27888
SM 2540
UNE-EN ISO 8467
UNE-EN ISO 7027-1
UNE-EN ISO 10523
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AOAC 995.11
UNE EN ISO 6869
AOAC 985.35
UNE-EN 17298
UNE 77324
ISO 23318
UNE 77325
ISO 10390
UNE 77308
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DIN EN 60335-2-51
DIN EN 60335-2-43
IEC 62054-21
IEC 60335-2-51
DIN EN 60335-2-99
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LADICIM
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UNE-EN 124-5
UNE-EN ISO 945-1
UNE-EN 124-1
UNE-EN 124
UNE-EN ISO 15630-3
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8 mT/A ≤ B/I < 500 mT/A
80 mT ≤ B ≤ 1,1 T
0,2 mT ≤ B < 1,1 T
0 mT ≤ B < 80 mT
10 Wb < 0,2 Wb
+ 2 more
CEM DI-021
CEM DI-008
EURAMET CG-10
CEM DI-005
EURAMET CG-6
+ 2 more
TERMOCAL
Active
3,5 kPa P 70 kPa 70 kPa < P 700 kP
3,5 kPa P 2,0 MPa 2,0 MPa < P 7,0
3,5 kPa P 20 kPa 20 kPa < P 70 kPa
100 kPa P 6,1 MPa 6,1 MPa < P 100
100 kPa P 70 MPa
+ 3 more
nach DIN EN ISO 3650:1999
EURAMET CG-6
ISO 5436-1
CEM DI-013
CEM DI-012
+ 3 more
CEM DI-025
CEM DI-018
UNE-EN ISO 21920-3
CEM DI-009
CEM DI-003
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UNE-EN ISO 7887
UNE-EN ISO 17852
UNE-EN ISO 8467
ISO 7150-1
SM 2510 B
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LABORATORIOS EYCO
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ISO 5-3
ISO 2813
UNE-EN ISO 9342-1
UNE-EN ISO 8598-1
ISO 3664
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LABORATORIOS OMEGA
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UNE 10523
UNE 27888
UNE 7027-1
ISO 23695
UNE-EN ISO 9308-1
+ 3 more
UNE-EN 7027-1
UNE-EN ISO 10523
SM 2520 B
UNE EN 27888
UNE-EN 872
+ 3 more
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