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BS EN ISO 11819-1:2023

BS EN ISO 11819-1:2023

$198.66

Acoustics. Measurement of the influence of road surfaces on traffic noise – Statistical pass-by method

Published By Publication Date Number of Pages
BSI 2023 60
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This document specifies a method of comparing traffic noise on different road surfaces for various compositions of road traffic for the purpose of evaluating different road surface types. Sound levels representing either light or heavy vehicles at selected speeds are assigned to a certain road surface. The method is applicable to traffic travelling at constant speed, i.e. free-flowing conditions at posted speeds of 50 km/h and upwards. For conditions where traffic is not free flowing, such as at junctions and where the traffic is congested, the method is not applicable. A standard method for comparing the noise characteristics of road surfaces gives road and environment authorities a tool for establishing common practices or limits regarding the use of road surfaces meeting certain noise criteria. However, it is not within the scope of ISO 11819 (all parts) to suggest such criteria. The statistical pass-by (SPB) method is suitable for use for the following main purposes: ā€”    to classify road surfaces according to their influence on traffic noise (surface classification); ā€”    to assist in verifying conformity of production of road surfaces; ā€”    to evaluate acoustic performance of road surfaces throughout operation relative to new condition; ā€”     to evaluate the influence of different road surfaces on traffic noise at sites irrespective of condition and service time; ā€”    to evaluate acoustic performance of a road surface relative to a reference surface. Due to practical restrictions, the method cannot be applied at all possible locations. However, the backing board method can allow some locations to be tested that were not previously acceptable. Clause 5 gives a general description of the SPB method.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 European foreword
Endorsement notice
7 Foreword
9 Introduction
11 1 Scope
2 Normative references
12 3 Terms and definitions
3.1 Types of noise
3.2 Measurement method
3.3 Road speed categories
13 3.4 Vehicle categories
3.5 Measured noise quantities
14 3.6 Road surface terms applicable in this method
3.7 Backing board terms
4 Symbols and abbreviated terms
15 5 Measuring principle
6 Instrumentation
6.1 Instruments for acoustical measurements
6.1.1 General
6.1.2 Verification
16 6.2 Instruments for vehicle speed measurements
6.2.1 General
6.2.2 Verification
6.3 Instruments for temperature measurements
6.3.1 General
6.3.2 Verification
7 Test sites
7.1 Selection of measuring site
17 7.2 Deviations from free-field conditions
7.3 Considerations of guard rails and other barriers which can reflect or screen the sound
7.4 Surface between the tested road surface and microphone
20 7.5 Backing board
8 Traffic conditions
8.1 Vehicle classification
8.2 Selection of vehicles for measurement
21 8.3 Minimum number of vehicles
22 8.4 Road speed categories
9 Measuring procedure
9.1 Microphone position
23 9.2 Calibrations
24 9.3 Sound level measurement
9.4 Frequency spectrum measurement
9.5 Speed measurement
9.6 Temperature measurement
10 Meteorological conditions
10.1 Wind
10.2 Temperature
10.3 Recommendations on road surface moisture
25 11 Background noise
12 Normalization of data
12.1 Compensating for the effect of the additional (higher) microphone position
12.2 Combining vehicle categories H2 and H3+ into a common heavy vehicle category H
26 12.3 Noise versus speed – regression analysis (for passenger cars)
12.4 Noise versus speed ā€“ normalization to reference speed (for heavy vehicles)
28 12.5 Noise versus speed ā€“ normalization of frequency spectra for vehicles in categories P and H
12.6 Determination of SPB sound level at reference speeds
12.7 Useful speed range for the speed normalization
12.8 Correction of sound levels according to temperature
29 13 Measurement uncertainty
30 14 Reported data
14.1 General information
31 14.2 Information relating to the location and appearance of the test site
14.3 Information relating to the type and construction of the tested road surface
14.4 Information relating to the condition of the tested surface and environmental factors
14.5 Road speed category and vehicle information
14.6 Measured and calculated sound level and speed data
32 14.7 Others
33 Annex A (normative) Vehicle categories
37 Annex B (informative) Determination of the statistical pass-by index (SPBI)
39 Annex C (informative) The backing board variant
44 Annex D (informative) Adding 95 % confidence intervals
45 Annex E (informative) Validity and stability of the method
46 Annex F (informative) Reference road surface
48 Annex G (informative) Monitoring the stability of sound levels of vehicle fleets
50 Annex H (informative) Uncertainty
53 Annex I (informative) Example of test report
57 Bibliography

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BS EN ISO 11819-1:2023
$198.66