DIN EN ISO 3381 2011-05 PDF

Full title and description

STB DIN EN ISO 3381: Railway applications — Acoustics — Measurement of noise inside railbound vehicles (ISO 3381:2005); German version EN ISO 3381:2011. This document specifies procedures and conditions for obtaining reproducible and comparable measurements of internal noise levels and spectra in railbound vehicles (trains), excluding track‑maintenance vehicles in operation.

Abstract

Defines instrumentation, measurement quantities, test conditions and test procedures for assessing noise inside rail vehicles for type testing and periodic monitoring. The standard prescribes engineering‑grade measurement procedures (preferred accuracy class ±2 dB for noise declaration) and describes tests under different operating states (running, accelerating, decelerating, standstill). Infrasound and announcement intelligibility are outside its scope; accelerating and decelerating procedures are of survey grade.

General information

• Status: Superseded / withdrawn in national adoptions; replaced by the 2021/2022 edition (EN ISO 3381:2021 / DIN EN ISO 3381:2022-09).
• Publication date: 2011-05.
• Publisher: Deutsches Institut für Normung (DIN) — German adoption of EN ISO 3381:2011 (also published as EN ISO by CEN / ISO original).
• ICS / categories: 17.140.30, 45.060.01.
• Edition / version: DIN EN ISO 3381:2011-05 (German version of EN ISO 3381:2011, based on ISO 3381:2005).
• Number of pages: 28 (German DIN publication).

Scope

Applicable to measurement of internal noise in all kinds of railbound vehicles (conventionally “train”), for type testing and periodic monitoring. Excludes track‑maintenance vehicles in operation, infrasound assessment and message intelligibility. The standard allows tests in various operating conditions (running, accelerating, decelerating, standstill); the selection of conditions is decided by the relevant authority, vehicle owner or operator.

Key topics and requirements

• Definitions of measurement quantities and reference levels for internal noise.
• Requirements for instrumentation (microphones, data acquisition, calibration) and measurement setup inside vehicles.
• Specified test conditions and operating states: running, accelerating, decelerating and standstill; procedures for each state.
• Test procedures for obtaining repeatable, comparable results suitable for type testing and periodic monitoring.
• Reporting requirements: test reports shall detail instrumentation, track and vehicle conditions, operating points and measured spectra/levels.
• Precision/accuracy classes: engineering grade preferred for noise declaration (≈ ±2 dB as per EN ISO 12001); accelerating/decelerating procedures given as survey grade.

Typical use and users

Used by railway vehicle manufacturers, acoustic and noise consultants, operators and fleet owners for type approval, in‑service monitoring and comparative assessments; also used by certification bodies, accreditation laboratories and regulatory agencies involved in vehicle noise regulation and labelling.

Related standards

ISO 3381:2005 is the original text adopted as EN ISO 3381:2011; this 2011 adoption was later replaced by EN ISO 3381:2021 (published as DIN EN ISO 3381:2022-09 in the German catalogue). The standard refers to noise‑declaration accuracy classes in EN/ISO documents such as EN ISO 12001; the 2021/2022 revision consolidates and updates earlier editions (and replaces related documents including EN 15892:2011 where applicable).

Keywords

railway, railbound vehicles, acoustics, internal noise measurement, noise inside trains, ISO 3381, EN ISO 3381, noise testing, vehicle type testing, periodic monitoring, measurement procedures, instrumentation, noise spectra.

FAQ

Q: What is this standard?

A: A European/DIN adoption of ISO 3381 that specifies how to measure noise inside railbound vehicles for type testing and monitoring (EN ISO 3381:2011, German version published May 2011).

Q: What does it cover?

A: Instrumentation, measurement quantities, test conditions and procedures for obtaining reproducible and comparable internal noise levels and spectra under defined vehicle operating states; it excludes infrasound and announcement intelligibility.

Q: Who typically uses it?

A: Railway vehicle manufacturers, acoustic consultants, test laboratories, certification bodies, operators and regulators involved with vehicle noise assessment and compliance.

Q: Is it current or superseded?

A: Superseded. The 2011 edition (EN ISO 3381:2011 / DIN EN ISO 3381:2011-05) has been replaced by the 2021 international revision (published in the German catalogue as DIN EN ISO 3381:2022-09). National adoptions may show the 2011 text as withdrawn.

Q: Is it part of a series?

A: It is part of ISO/CEN work on railway acoustics and links to related acoustics standards (for example EN ISO 12001 for noise declaration accuracy); editions exist from earlier ISO versions (1976, 2005) and a later revision (2021).

Q: What are the key keywords?

A: railway, acoustics, noise measurement, internal noise, railbound vehicles, ISO 3381, EN ISO 3381, type testing, periodic monitoring.