1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Road traffic noise reducing devices - Test method for determining the acoustic performancePart 2: Intrinsic characteristics of airborne sound insulation under diffuse sound field conditionsBS EN 17932:2018EUROPEAN STAND
2、ARD NORME EUROPENNE EUROPISCHE NORM EN 1793-2 June 2018 ICS 17.140.30; 93.080.30 Supersedes EN 1793-2:2012English Version Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 2: Intrinsic characteristics of airborne sound insulation under diffuse sound fi
3、eld 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 conditions de champ acoustique diffus Lrmschutzvorrichtungen an Straen - Prfverfahren
4、zur Bestimmung der akustischen Eigenschaften - Teil 2: Produktspezifische Merkmale der Luftschalldmmung in diffusen Schallfeldern This European Standard was approved by CEN on 19 February 2018. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions f
5、or 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 thr
6、ee 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 bo
7、dies 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, Serbia, Slovakia, Sl
8、ovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means re
9、served worldwide for CEN national Members. Ref. No. EN 1793-2:2018 ENational forewordThis British Standard is the UK implementation of EN 17932:2018. It supersedes BS EN 17932:2012, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/509/6, Fences for th
10、e attenuation 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 2018
11、Published by BSI Standards Limited 2018ISBN 978 0 580 95133 6ICS 17.140.30; 93.080.30Compliance 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 31 July 2018.Amendments/cor
12、rigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 17932:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1793-2 June 2018 ICS 17.140.30; 93.080.30 Supersedes EN 1793-2:2012English Version Road traffic noise reducing devices - Test method for determining the acoustic per
13、formance - Part 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
14、 dans des conditions de champ acoustique diffus Lrmschutzvorrichtungen an Straen - Prfverfahren zur Bestimmung der akustischen Eigenschaften - Teil 2: Produktspezifische Merkmale der Luftschalldmmung in diffusen Schallfeldern This European Standard was approved by CEN on 19 February 2018. CEN member
15、s 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
16、 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 Managemen
17、t 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, Li
18、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la
19、 Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1793-2:2018 EBS EN 17932:2018EN 1793-2:2018 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope 6 2 Normative references 6 3 Terms and d
20、efinitions . 6 4 Symbols and abbreviations . 7 5 Test arrangement 7 6 Test procedure and evaluation 8 6.1 Test method 8 6.2 Single-number rating of airborne sound insulation, DLR. 8 6.3 Expression of results 9 7 Measurement uncertainty . 9 8 Test report . 9 Annex A (informative) Categorization of si
21、ngle-number rating 10 Annex B (informative) Guidance note on the use of the single number rating DLR. 11 Annex C (informative) Measurement uncertainty 12 C.1 General . 12 C.2 Measurement uncertainty based upon reproducibility data . 12 Bibliography . 13 BS EN 17932:2018EN 1793-2:2018 (E) 3 European
22、foreword This document (EN 1793-2:2018) 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 lates
23、t by December 2018, and conflicting national standards shall be withdrawn at the latest by December 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rig
24、hts. This document supersedes EN 1793-2:2012. With respect to the superseded document, the following changes have been made: The declaration of measurement uncertainty and the related confidence level is now mandatory. The categories of single number rating have been removed from Annex A. The perfor
25、mance of the noise reducing device is, from now on, only to be reported in terms of the numeric values of the single number rating. EN 1793-2 is part of a series of documents and will be read in conjunction with the following: EN 1793-1, Road traffic noise reducing devices - Test method for determin
26、ing the acoustic performance Part 1: Intrinsic characteristics of sound absorption under diffuse sound field conditions; EN 1793-3, Road traffic noise reducing devices - Test method for determining the acoustic performance Part 3: Normalized traffic noise spectrum; EN 1793-4, Road traffic noise redu
27、cing devices - Test method for determining the acoustic performance Part 4: Intrinsic characteristics - In situ values of sound diffraction; EN 1793-5, Road traffic noise reducing devices - Test method for determining the acoustic performance Part 5: Intrinsic characteristics - In situ values of sou
28、nd reflection under direct sound field conditions; 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 I
29、nternal Regulations, the national standards organizations 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
30、, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 17932:2018EN 1793-2:2018 (E) 4 Introduction Noise reducing devices alongside roads should provide adequ
31、ate sound insulation so that sound transmitted through the device is not significant compared with the sound diffracted over the top. This document specifies a test method for qualifying the intrinsic airborne sound insulation performance for noise reducing devices designed for roads in reverberant
32、conditions, e.g. 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
33、assumes a directional sound field. Research studies suggest that good correlation exists between field data, measured according to EN 1793-6 and laboratory data, measured according to the method described in the present document 1, 2, 3, 4. This document is not concerned with determining insertion l
34、oss (extrinsic performance) which additionally depends on 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 airborne sound
35、 insulation performance of the device to be measured; the resulting rating should aid the selection of devices for reverberant roadside applications. For the purpose of this document reverberant conditions are defined based on the geometric envelope, e, across the road formed by the barriers, trench
36、 sides or buildings (the geometric envelope does not include the road surface) as shown by the dashed lines in Figure 1. Conditions are defined as being reverberant when the percentage of open space in the geometric envelope is less than or equal to 25 %, i.e. reverberant conditions occur when w/e 0
37、,25, where e = (w+h1+h2). NOTE This method can be used to qualify noise reducing devices for other applications, e.g. to be installed nearby industrial sites. In this case, the single-number ratings can preferably be calculated using an appropriate spectrum. BS EN 17932:2018EN 1793-2:2018 (E) 5 a) P
38、artial cover on both sides of the road; b) Partial cover on one side of the road; geometric envelope, e = w+h1+h2geometric envelope, e = w+h1c) Deep trench; d) Tall barriers or buildings; geometric envelope, e = w+h1+h2geometric envelope, e = w+h1+h2Key r road surface w width of open space h1 develo
39、ped length of element, e.g. cover, trench side, barrier or building h2 developed length of element, e.g. cover, trench side, barrier or building NOTE Figure 1 is not to scale. Figure 1 Sketch of the reverberant condition check in four cases BS EN 17932:2018EN 1793-2:2018 (E) 6 1 Scope This document
40、specifies the laboratory method for measuring the airborne sound insulation performance of road traffic noise reducing devices in reverberant conditions. It covers the assessment of the intrinsic performance of barriers that can reasonably be assembled inside the testing facility described in EN ISO
41、 10140-2 and EN ISO 10140-4. This method is not intended for the determination of the intrinsic characteristics of airborne sound insulation of noise reducing devices to be installed on roads in non-reverberant conditions. 2 Normative references The following documents are referred to in the text in
42、 such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1793-3, Road traffic noise reducing devices - Te
43、st method for determining the acoustic performance Part 3: Normalized traffic noise spectrum EN ISO 10140-1, Acoustics - Laboratory measurement of sound insulation of building elements Part 1: Application rules for specific products (ISO 10140-1) EN ISO 10140-2, Acoustics - Laboratory measurement of
44、 sound insulation of building elements Part 2: Measurement of airborne sound insulation (ISO 10140-2) EN ISO 10140-4, Acoustics - Laboratory measurement of sound insulation of building elements Part 4: Measurement procedures and requirements (ISO 10140-4) ISO/IEC Guide 98-3, Uncertainty of measureme
45、nt Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: ava
46、ilable at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 3.1 noise reducing device device that is designed to reduce the propagation of traffic noise away from the road environment Note 1 to entry: This may be a noise barrier, cladding, a road cover or a
47、n added device. These devices may include both acoustic and structural elements. 3.2 acoustic element element whose primary function is to provide the acoustic performance of the device 3.3 structural element element whose primary function is to support or hold in place acoustic elements BS EN 17932
48、:2018EN 1793-2:2018 (E) 7 4 Symbols and abbreviations For the purposes of this document, the following symbols apply. Table 1 Symbols and abbreviations Symbol or abbreviation Designation Unit RiSound reduction index in the ithone-third octave band dB LiNormalized A weighted sound pressure level of t
49、raffic noise in the ithone-third octave band defined in EN 1793-3 dB DLRSingle-number rating of airborne sound insulation performance expressed as a difference of A weighted sound pressure levels dB 5 Test arrangement The test arrangement shall be as described in EN ISO 10140-1, EN ISO 10140-2 and EN ISO 10140-4 for partitions with the following modifications: The test specimen shall be mounted in the test opening and assembled in the same manner as the manufactured device is used in pr
