ISO 3381 specifies the measurement method and conditions to obtain reproducible noise levels on-board all kinds of vehicles operating on rails or other types of fixed track, hereinafter conventionally called “unit”, except for track maintenance vehicles in working modes.
ISO 3381 provides measurement procedures for vehicle interior noise (in general, a vehicle type test is carried out using only a selected subset of these tests):
NOTE: ISO 3381 does not include all the instructions to carry out monitoring testing or evaluation of noise exposure of passengers or drivers over a whole journey.
NOTE: This document is not applicable to guided buses. The assessment of noise exposure of train crew due to operational conditions is not in this document.
NOTE: This document does not provide measurement procedures for:
ISO 3381 on railbound vehicles acoustics is useful for:
Roughness and irregularities on the wheel and rail surfaces are a source of noise and vibration. ISO 3381 specifies the noise measurement inside railbound vehicles.
ISO 3381 gives information regarding the sound calibrator and instrumentation like microphones, signal acquisition units and processing algorithms used in railways to analyse frequency bandwidth.
ISO 3381 lets you know about the characteristics of noise inside the rolling stocks and comparison of the internal noise of various units on a particular track section to collect basic source data for units, this data will let you analyse the noise profiles of different parts. In this manner, you will be able to create an efficient and noise-free functioning of the railway infrastructure.
BS EN ISO 3381:2021 supersedes BS EN ISO 3381:2011. BS EN ISO 3381:2021 includes some technical changes with respect to BS EN ISO 3381:2011. These include:
ISO 3381
EN ISO 3381