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
🇮🇹
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 801–825 of 1,516 labs
Basophile Granulozyten
Eosinophile Granulozyten
Erythrozyten
Hämatokrit
Leukozyten
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Laborgemeinschaft Köln
Active
Liste aller Untersuchungsverfahren im fl
Webpräsenz des Medizinischen Laboratoriu
HbA1c
Basophile
Basophile absolut
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Laborgemeinschaft Odenwald
Active
HbA1c
Großes Blutbild
Kleines Blutbild
Retikulocyten
Natriumchlorid
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Laborärzte Sindelfingen
Active
Ristocetin Kofactor Aktivität
Willibrand Faktors
a-Hydroxy-Alprazolam
Amilsulprid
7-amino-Flunitrazepam
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Lambda Calibration
Active
PRESSURE (cont’d)
Distortion Factor
Spot frequency
Phase angle
(Herpes simplex virus type
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Lambeth Scientific Services
Active
(HSG 248) – 2021
(PCM) based on HSG 248
P-12 based on HSG 248
(HSG 248) – 2021
(PCM) based on HSG 248
ISO 12966-2
F06 6 & F06 5 based on BS EN
F05 4 based on BS 770:Part
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DIN EN 16174
DIN CEN ISO/TS 16179
DIN EN 15933
DIN ISO 15178
DIN EN 15936
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GPT
GOT
GGT
Salmonellen
Shigellen
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Leadec BV &
Active
Gleichspannung 33 mV
Messgeräte 0,33 V
330 V
Gleichstromstärke 33 µA
Messgeräte 0,33 mA
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Leftfield Environmental
Active
(HSG 248) – 2021
LSOP6 based on HSG 248
(PCM) based on HSG 248
(ein- und mehrgängige
zylindrische Außen- und
symmetrischem und
unsymmetrischem Profil)
Außengewinde
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DIN EN 60601-2-4
IEC 60512-4-1
DIN EN 124-2
IEC 60512-4-3
DIN EN 60601-2-44
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Les Préleveurs Indépendants
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DIN ISO 17289
ISO 5667-9 (hors échant.
DIN EN ISO 7027-2
NF X 31-615 (Uniquement
DIN EN ISO 10523
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Life Environmental Services
Active
(HSG 248) – 2021
QSOP 01 based on HSG 248
(PCM) based on HSG 248
QSOP 03 based on HSG 248
Aluminium
Blei
Eisen, Kupfer
Ampicillin
Cefepim
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anteile
Kohlenstoffmonoxid
Kohlenstoffdioxid
Methan
Ethan
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accordance with (EN ISO 14644-
BS EN ISO 14644-1:2015
London Borough of Enfield
Active
staining based on HSG 248
(HSG 248) – 2021
(PCM) based on HSG 248
London Laboratories
Active
(HSG 248) – 2021
ASB04 based on HSG 248
(PCM) based on HSG 248
Lucideon
Active
DIN EN 772-13
DIN EN 1052-2
DIN EN 772-20
DIN EN 772-14
DIN EN 1052-4
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