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
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HAZET-WERK Hermann Zerver
Active
Tensile testing of metallic materials (I
Vickers hardness test (ISO 6507)
Drehmoment 2 N·m
Handbetätigte
20 N·m
+ 3 more
Verschlusszeit (ADP, Epinephrin, P2Y12)
HCG, ß-HCG
PF4/Heparin-Komplexe
induzierte Thrombozytopenie, Test)
Differenzialblutbild (maschinell)
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HCG, ß-HCG
Ampicillin
Cefipim
Hämoglobin A1c (HbA1c)
Linecolid
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ADP-Antagonisten
TRAP-6-Aktivierung
ASS-Inhibition
Thrombozyten-Funktionsanalyse
β-HCG
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HENSOLDT Sensors
Active
- Gleichspannung
Spannungsmessgeräte
> 20 V
> 200 V
Spannungsquellen
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Natriumchlorid
Glucose
Kalium
Natrium
Albumin
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HFB Engineering
Active
DIN EN ISO 10666
DIN 53438-3
rs738409
DIN EN 1382
DIN EN 1383
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Gleichspannung a)
/ Messgeräte
> 600 kV
Messsysteme, Teiler
> 5 kV
+ 3 more
IEC 61000-6-1
IEC 61000-6-2: 2005
VDE 0839-6-1
VDE 0839-6-2
power port EN 61000-4-29
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HLK Stuttgart
Active
DIN EN 442-2
DIN EN 16430-1
DIN EN 16430-2
DIN EN 16430-3
DIN 4703-3
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HSL Compliance
Active
(HSG 248) – 2021
M003 based on HSG 248
(PCM) based on HSG 248
M002based on HSG 248
HSG 227 (2004))
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HYDAC Systems & Services
Active
Gleichspannung 0 µV
Messgeräte > 20 mV
Messgeräte > 200 mV
> 2 V
> 20 V
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HaBu Hauck Prüftechnik
Active
Härte *) 20 HRA
Härtevergleichsplatten 20 HRB
nach Rockwell Verfahren 20 HRC
40 HRD
60 HRF
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Hampshire Scientific Service
Active
(HSG 248) - 2021
ASB/SOP/OM8 based on HSG 248
ASB/SOP/OM6 based on HSG 248
DIN EN 12697-11
on BS 4401:Part 3:1970(1986)
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Hartford Steam Boiler UK
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BS 2790 - Specification for the design a
BS 1113 - Specification for the design a
BS EN 13480 Parts 1 to 8 - Metallic
EN 13445 – Parts 1 to 10 Unfired pressur
BS EN ISO 15614 and ASME IX
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automatische Zelldifferenzierung
Erythrozyten
Leukozyten
Retikulozyten
Thrombozyten
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(HSG 264, 2012)
and Appx. 3 of HSG 227 (2004))
Executive guides HSG 264 (2012)
Absolutdruck p
abs
> 41 bar
Negativer und
positiver Überdruck
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Heywood Williams Components
Active
DIN EN 1026
DIN EN 12046-2
BS 6375-1:2015 + A1:2016 and the
DIN EN 1027
DIN EN 1629
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Hohenstein Laboratories
Active
DIN 53160
DIN 54034
DIN 54056
DIN EN 20105-A02
DIN EN 20105-N01
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Taupunkttemperatur
thermometer, -80 °C bis
Railway braking — urban guided transport
> -35 °C bis
Temperatur- −35 °C bis
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Hottinger Brüel & Kjaer
Active
Übertragungsmaß von
Messmikrofonen oder
Freifeld-Leerlauf- 20 Hz
Freifeld -Übertragungsmaß
Vorverstärker, nach IEC
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