EN 1793-1:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lärmschutzeinrichtungen an Straßen - Prüfverfahren zur Bestimmung der akustischen Eigenschaften - Teil 1: Produktspezifische Merkmale der SchallabsorptionDispositifs de réduction du bruit du trafic routier - Méthode d'essai pour la détermination de la performance acoustique - Partie 1: Caractéristiques intrinsèques de l'absorption acoustiqueRoad traffic noise reducing devices - Test method for determining the acoustic performance - Part 1: Intrinsic characteristics of sound absorption93.080.30Cestna oprema in pomožne napraveRoad equipment and installations17.140.30Emisija hrupa transportnih sredstevNoise emitted by means of transportICS:Ta slovenski standard je istoveten z:EN 1793-1:2012SIST EN 1793-1:2013en,fr,de01-februar-2013SIST EN 1793-1:2013SLOVENSKI
STANDARDSIST EN 1793-1:19991DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1793-1
November 2012 ICS 17.140.30; 93.080.30 Supersedes EN 1793-1:1997English Version
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 1: Intrinsic characteristics of sound absorption
Dispositifs de réduction du bruit du trafic routier - Méthode d'essai pour la détermination de la performance acoustique - Partie 1: Caractéristiques intrinsèques de l'absorption acoustique
Lärmschutzvorrichtungen an Straßen - Prüfverfahren zur Bestimmung der akustischen Eigenschaften - Teil 1: Produktspezifische Merkmale der Schallabsorption This European Standard was approved by CEN on 29 September 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1793-1:2012: ESIST EN 1793-1:2013

Categorisation of single-number rating . 9Annex B (informative)
Guidance note on use of the number rating DLαααα . 10Annex C (informative)
Measurement uncertainty . 11 SIST EN 1793-1:2013

 tunnels and their approaches;  traffic passing close to a barrier where reflections between the vehicles and the barrier may reduce effectiveness. This European Standard specifies a test method for qualifying the sound absorption performance of noise reducing devices designed for roads (a measure of intrinsic performance). It is not concerned with determining insertion loss (extrinsic performance) which depends on additional factors which are not related to the product itself, e.g. the dimensions of the barrier and quality of installation work and site factors such as ground impedance, site geometry etc. The test is designed to allow the intrinsic sound absorption performance of the device to be measured; the resulting rating should aid the selection of devices for particular roadside applications.
This method may be used to qualify noise reducing devices for other applications, e.g. found along railways or near industrial sites. In these cases, the single-number ratings should be calculated using an appropriate spectrum. In the previous version of this European Standard dated September 1997, the basic test method was derived from EN 20354:1985. In the current version of this European Standard, the basic test method is derived from EN ISO 354:2003. In the current version of the basic test method, an essential change was introduced compared to the previous version, viz. the application of a correction method for changes in sound attenuation in air caused by changes in air temperature and humidity during the test. Because this correction was not applied in the previous version of the test method, the results from the current version may deviate considerably from the results obtained with the previous version of the method. Specifically for test samples with a high absorption coefficient, these changes may amount to 1 dB or 2 dB for the single number rating DL., either in a positive or a negative sense. The effect of the application of the correction will be most noticeable in the higher frequency bands. To avoid possible confusion between the old and the new measurement results, the continued use
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