Abstract

This document describes 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. The test method is intended for the following applications: - determination of the intrinsic characteristics of sound aborption of noise reducing devices to be installed along roads, to be measured either on typical installations alongside roads or on a relevant sample section; - determination of the intrinsic characteristics of sound absorption of road traffic noise reducing devices in actual use under direct sound field conditions; - comparison of design specifications with actual performance data after the completion of the construction work; - verification of the long-term performance of noise reducing devices (with a repeated application of the method). The test method is not intended for the following applications: - 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, where possible, between 100 Hz and 5 kHz. If it is not possible to get valid measurements results over the whole frequency range indicated, the results should be given in a restricted frequency range and the reasons of the restriction(s) should be clearly reported.

Begin

2020-11-06

WI

00226265

Planned document number

DIN EN 1793-5

Project number

00519033

Responsible national committee

NA 005-10-26 AA - Noise reducing devices (national mirror committee for CEN/TC 226/WG 6)  

Responsible european committee

CEN/TC 226/WG 6 - Noise reducing devices  

draft standard

Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 5: Intrinsic characteristics - Sound absorption under direct sound field conditions; German and English version prEN 1793-5:2023
2023-08
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previous edition(s)

Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 5: Intrinsic characteristics - In situ values of sound reflection under direct sound field conditions; German version EN 1793-5:2016+AC:2018
2018-12

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