BS EN 1793-2-2012 en 3987 Road traffic noise reducing devices Test method for determining the acoustic performance Intrinsic characteristics of airborne sound insulation under diff.pdf
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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 1793-2:2012Road traffic noise reducing devices Test method for determining the acoustic performancePart 2: Intrinsic characteristics of airborne sound insulation under diff
2、use sound field conditionsBS EN 1793-2:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 1793-2:2012. It supersedes BS EN 1793-2:1998 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/509/6, Fences for the atten
3、uation of noise.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Publis
4、hed by BSI Standards Limited 2012ISBN 978 0 580 71107 7 ICS 17.140.30; 93.080.30 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2012.Amendments issu
5、ed since publicationDate T e x t a f f e c t e dBS EN 1793-2:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1793-2 November 2012 ICS 17.140.30; 93.080.30 Supersedes EN 1793-2:1997English Version Road traffic noise reducing devices - Test method for determining the acoustic performance - Pa
6、rt 2: Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions Dispositifs de rduction du bruit du trafic routier - Mthode dessai pour la dtermination de la performance acoustique - Partie 2: Caractristiques intrinsques de lisolation aux bruits ariens dans des cond
7、itions de champ acoustique diffus Lrmschutzvorrichtungen an Straen - Prfverfahren zur Bestimmung der akustischen Eigenschaften - Teil 2: Produktspezifische Merkmale der Luftschalldmmung unter den Bedingungen eines diffusen Schallfeldes This European Standard was approved by CEN on 29 September 2012.
8、 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
9、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-CENELE
10、C 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,
11、 Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17,
12、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 1793-2:2012: EBS EN 1793-2:2012EN 1793-2:2012 (E) 2 Contents Page Foreword 3Introduction . 41 Scope 62 Normative references 63 Symbols 64 Test arrangement . 65 Te
13、st procedure and evaluation 86 Measurement uncertainty . 87 Test report 8Annex A (normative) Categorisation of single-number rating .10Annex B (informative) Guidance note on use of the number rating DLR11Annex C (informative) Measurement uncertainty 12BS EN 1793-2:2012EN 1793-2:2012 (E) 3 Foreword T
14、his document (EN 1793-2:2012) has been prepared by Technical Committee CEN/TC 226 “Road equipment”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2
15、013, and conflicting national standards shall be withdrawn at the latest by March 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights
16、. This document supersedes EN 1793-2:1997. In the previous version of this European Standard, the scope covered the noise reducing devices wherever they can be used alongside roads. In the current version of this European Standard, as its adapted title states explicitly, the scope is restricted to n
17、oise reducing devices designed for use under diffuse field conditions, e.g. inside tunnels or deep trenches or under covers (an explanation is presented in the introduction). EN 1793-2 is part of a series and should be read in conjunction with the following: EN 1793-1, Road traffic noise reducing de
18、vices Test method for determining the acoustic performance Part 1: Intrinsic characteristics of sound absorption; EN 1793-3, Road traffic noise reducing devices Test method for determining the acoustic performance Part 3: Normalized traffic noise spectrum; CEN/TS 1793-4, Road traffic noise reducing
19、devices Test method for determining the acoustic performance Part 4: Intrinsic characteristics In situ values of sound diffraction; CEN/TS 1793-5, Road traffic noise reducing devices Test method for determining the acoustic performance Part 5: Intrinsic characteristics In situ values of sound reflec
20、tion and airborne sound insulation; EN 1793-6, Road traffic noise reducing devices Test method for determining the acoustic performance Part 6: Intrinsic characteristics In situ values of airborne sound insulation under direct sound field conditions. According to the CEN/CENELEC Internal Regulations
21、, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, L
22、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 1793-2:2012EN 1793-2:2012 (E) 4 Introduction Noise reducing devices alongside roads have to provide adequate sound insulation so t
23、hat sound transmitted through the device is not significant compared with the sound diffracted over the top. This European Standard specifies a test method for qualifying the intrinsic airborne sound insulation performance for noise reducing devices designed for roads in reverberant conditions, e.g.
24、 inside tunnels or deep trenches or under covers. The measurement results of this method for airborne sound insulation are comparable but not identical with the results of the test method EN 1793-6, mainly because the present method uses a diffuse sound field, while the other method assumes a direct
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