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  • BSI
    BS EN 1793-5:2025 Road traffic noise reducing devices. Test method for determining the acoustic performance - Intrinsic characteristics. Sound absorption under direct sound field conditions
    Edition: 2026
    $633.39
    / user per year

Description of BS EN 1793-5:2025 2026

This document specifies a test method for measuring a quantity representative of the intrinsic characteristics of sound reflection from road noise reducing devices, the sound reflection index, and then calculate a single-number rating for sound absorption from it. This document is applicable to: - the determination of the intrinsic characteristics of sound absorption of noise reducing devices to be installed along roads, to be measured either on typical installations alongside roads or on a relevant test specimen section; - the determination of the intrinsic characteristics of sound absorption of road traffic noise reducing devices in actual use under direct sound field conditions; - the comparison of design specifications with actual performance data after the completion of the construction work; - the verification of the long-term performance of road traffic noise reducing devices (with a repeated application of the method). This document does not apply to: - the determination of the intrinsic characteristics of sound absorption of road traffic noise reducing devices to be installed in reverberant conditions, e.g. inside tunnels or deep trenches. Results for the sound reflection index are expressed as a function of frequency, in one-third octave bands between 200 Hz and 5 kHz, for qualification purposes. If it is not possible to get valid measurement results over the whole frequency range indicated, the results are given in a restricted frequency range, and the reasons for the restriction(s) are clearly reported. For indoor measurements, see Annex D.

Standard NumberBS EN 1793-5:2025
TitleRoad traffic noise reducing devices. Test method for determining the acoustic performance - Intrinsic characteristics. Sound absorption under direct sound field conditions
StatusDefinitive
Publication Date2026-01-13
ReplacesBS EN 1793-5:2016
Identical National Standard OfEN 1793-5:2025
DescriptorsRoad vehicles, Reflection, Acoustic measurement, Noise control (acoustic), Acoustic absorption, Road transport, Noise control devices, Sound insulation, Airborne sound insulation
ICS17.140.30 Noise emitted by means of transport, 93.080.30 Road equipment and installations
CommitteeB/509/6
ISBN978 0 539 25632 1
PublisherBSI
Pages76



About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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