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
Countries
Showing 1,101–1,125 of 1,516 labs
DIN EN ISO 21528-1
DIN 53483-2
DIN EN ISO 21528-2
DIN ISO 11665-4
DIN EN ISO 16649-3
+ 3 more
ISO 18787
AM09 based on BS ISO 21527-1:
DIN EN ISO 11290-1
NF V04-408
0.95) based on BS ISO 21527-2:2008
+ 2 more
DIN EN ISO 21528-1
NF V08-401
DIN EN ISO 21528-2
DIN EN ISO 6888-1
DIN EN ISO 6888-2
+ 3 more
DIN EN ISO 21528-1
DIN EN ISO 21528-2
DIN EN ISO 6888-1
DIN EN ISO 6888-2
DIN ISO 16649-2
+ 3 more
Absolutdruck Pabs
> 0,05 bar
Negativer und
positiver Überdruck p
(ein- oder mehrgängige
+ 1 more
SKZ - Testing
Active
Bauart wie GR 1482
DIN ISO 48-4
DIN ISO 7619-2
DIN EN ISO 868
DIN EN ISO 2039-1
+ 3 more
IEC 61000-4-2: 2008
IEC 61000-4-3: 2006
DIN EN IEC 61000
IEC 61000-4-4: 2012
IEC 61000-4-5: 2005
+ 3 more
DIN EN ISO 11737-2
DIN 58953-6
DIN 1946-4
DIN EN 13959
DIN EN ISO 8536-4
+ 3 more
NF X 43-050
NF X 43-269
NF X 43-269 – Annexe K
NF X43-050 (parties utiles de la
DIN ISO 16000-3
+ 3 more
SMA Solar Technology
Active
IEC 61000-4-2: 2008
VDE 0847-4-2
IEC 61000-4-3: 2006
VDE 0847-4-3
IEC 61000-4-4: 2012
+ 3 more
DIN EN ISO 1833-13
DIN EN ISO 1833-14
DIN EN ISO 1833-16
DIN EN ISO 1833-17
DIN EN ISO 1833-18
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ISO 13737
NF ISO 22286
ASTM D 2137
NF F19-503
NF T60-190
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DIN EN ISO 10545-3
DIN EN 997
DIN EN ISO 10545-4
DIN EN ISO 10545-14
DIN EN ISO 10545-6
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SOCOTEC Asbestos
Active
(HSG 248) – 2021
SCI/ASB/003 based on HSG 248
(PCM) based on HSG 248
SCI/ASB/001 based on HSG 248
SOCOTEC ENVIRONNEMENT
Active
DIN EN 14385
ETSI EN 301 489-1 V2.2.3 2019-11
DIN EN ISO 21877
NF X 43-317
DIN EN 14181
+ 3 more
SOLVIAS FRANCE
Active
ISO 11737-3
DIN EN ISO 11737-2
NF EN 13824 (norme
BS EN ISO 11737-1:2018
SPS electronic
Active
- Gleichspannung
Messgeräte 1 mV
> 330 mV
3,3 V
Messgeräte 0,33 V
+ 3 more
Vibration measuring instruments — test m
Vibration measurements near traffic — me
Härteprüfmaschinen
Acoustics — tonality assessment (DIN 456
Noise measurement on railway vehicles —
+ 3 more
SYNLAB GHANA
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Alpha-Fetoprotein
Beta Human Chorionic Gonadotrophin
(BHCG), quantitative
CA 125
CEA
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SYNLAB MVZ Augsburg
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HbA1c
Bilirubin Kapillare
Ethanol (Blutalkohol)
Parvovirus-B19-IgG, -IgM
Salmonellen IgA
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Mycobacterium tuberculosis
Komplex
Mykobakterien
Obligat aerobe Aktinomyceten
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Großes Blutbild
Kleines Blutbild
Retikulozyten
Natriumchlorid
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