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BS EN ISO 3381:2021

BS EN ISO 3381:2021

$189.07

Railway applications. Acoustics. Noise measurement inside railbound vehicles

Published By Publication Date Number of Pages
BSI 2021 50
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This document 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.

This document is applicable to type testing. It does not include all the instructions to carry out monitoring testing or evaluation of noise exposure of passengers or drivers over a whole journey.

This document is not applicable to guided buses.

It provides measurement procedures for vehicle interior noise (in general, a vehicle type test is carried out using only a selected subset of these tests):

  • when the vehicle is moving at constant speed;

  • when the vehicle is stationary;

  • when the vehicle is accelerating or decelerating;

  • in the driver’s cab when an external warning horn is sounding (specifically required for European Union regulation application)

It does not provide measurement procedures for:

  • audibility or intelligibility of any audible signals;

  • assessment of warning devices other than warning horns.

The assessment of noise exposure of train crew due to operational conditions is not in the scope of this document.

The results can be used, for example:

  • to characterise the noise inside these units;

  • to compare the internal noise of various units on a particular track section;

  • to collect basic source data for units.

The test procedures specified in this document are of engineering grade (grade 2), the preferred grade for noise declaration purposes as defined in ISO 12001 . If test conditions are relaxed, for example as they are for monitoring of in-service trains, then the results are no longer of engineering grade.

The procedures specified for accelerating and decelerating tests are of survey grade (grade 3).

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
8 Foreword
9 1 Scope
2 Normative references
10 3 Terms and definitions
11 4 Instrumentation and calibration
4.1 Instrumentation
4.2 Calibration
12 5 Measurement positions
5.1 Division of the unit into areas
5.1.1 General
5.1.2 Definition of area types
5.1.3 Definition of area acoustics
5.1.4 Selection of areas to be assessed
14 5.2 Measurement positions
15 5.3 Measurement height
5.3.1 Seating position
5.3.2 Standing position
5.3.3 Lying position
16 5.3.4 Driving position
17 6 Stationary test
6.1 General
6.2 Environmental conditions
6.2.1 Acoustical environment
6.2.2 Meteorological conditions
18 6.2.3 Background sound pressure level
6.3 Track conditions
6.4 Vehicle conditions
6.4.1 General
6.4.2 Normal operating conditions
19 6.4.3 Additional operating conditions
6.5 Measured quantities
6.6 Test procedure
6.7 Data processing
6.7.1 Standard processing
20 6.7.2 Additional processing
7 Testing in cabs when sounding an external warning horn
7.1 Environmental conditions
7.1.1 Acoustical environment
21 7.1.2 Meteorological conditions
7.1.3 Background sound pressure level
7.2 Track conditions
7.3 Vehicle conditions
7.4 Measured quantities
7.5 Test procedure
22 7.6 Data processing
7.6.1 Standard processing
7.6.2 Additional processing
8 Constant speed test
8.1 General
8.2 Environmental conditions
8.2.1 Acoustical environment
23 8.2.2 Meteorological conditions
8.2.3 Background sound pressure level
8.3 Track conditions
8.3.1 General
8.3.2 Track design
24 8.3.3 Track superstructure
8.3.4 Track quality
8.3.5 Rail roughness and track dynamic properties
8.3.6 Special conditions
8.4 Vehicle conditions
8.4.1 General
25 8.4.2 Normal operating conditions
8.4.3 Occupancy and load
8.4.4 Wheel tread conditioning
26 8.4.5 Additional conditions
8.5 Measured quantities
8.6 Test procedure
8.6.1 General
8.6.2 Test speeds
8.6.3 Measurement time intervals
27 8.7 Data processing
8.7.1 Standard processing
8.7.2 Additional processing
28 9 Acceleration from stand-still test and deceleration to stand-still test
9.1 General
9.2 Environmental conditions
9.2.1 Acoustical environment
9.2.2 Meteorological conditions
29 9.2.3 Background sound pressure level
9.3 Track conditions
9.4 Vehicle conditions
9.4.1 General
30 9.4.2 Normal operating conditions
9.4.3 Occupancy and load
9.4.4 Wheel tread conditions
31 9.5 Test procedure for the acceleration test
9.6 Test procedure for the deceleration test
9.7 Maximum level method
9.7.1 Measured quantities
9.7.2 Data processing
32 9.8 Averaged level method
9.8.1 Measured quantity
9.8.2 Data processing
33 10 Quality of the measurements
10.1 Deviations from the requirements
10.2 Positional tolerances
10.3 Measurement spread
10.4 Measurement uncertainties
11 Test report
35 Annex A (informative) Guidance on the definition and reporting of vehicle conditions
36 Annex B (informative) Method to characterize the impulsive character of the noise
38 Annex C (normative) Acoustic track characteristics
42 Annex D (informative) Specific environments
45 Annex E (informative) Quantification of measurement uncertainties according to ISO/IEC Guide 98‑3
49 Bibliography

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BS EN ISO 3381:2021
$189.07