DIN EN 16272-3-2-2014 Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance .pdf

1、October 2014 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC

2、S 93.100!%;(“2242405www.din.deDDIN EN 16272-3-2Railway applications Track Noise barriers and related devices acting on airborne soundpropagation Test method for determining the acoustic performance Part 3-2: Normalized railway noise spectrum and single number ratingsfor direct field applications;Eng

3、lish version EN 16272-3-2:2014,English translation of DIN EN 16272-3-2:2014-10Bahnanwendungen Oberbau Lrmschutzwnde und verwandte Vorrichtungen zur Beeinflussung derLuftschallausbreitung Prfverfahren zur Bestimmung der akustischen Eigenschaften Teil 3-2: Standardisiertes Schienenverkehrslrmspektrum

4、und Einzahl-Angaben frgerichtete Schallfelder;Englische Fassung EN 16272-3-2:2014,Englische bersetzung von DIN EN 16272-3-2:2014-10Applications ferroviaires Voie Dispositifs de rduction du bruit Mthode dessai pour la dtermination desperformances acoustiques Partie 3-2 : Spectre de bruit ferroviaire

5、normalis et indicesuniques dvaluation pour des applications en champ direct;Version anglaise EN 16272-3-2:2014,Traduction anglaise de DIN EN 16272-3-2:2014-10www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 16 pages 08.14 DIN EN 16272-3-

6、2:2014-10 2 A comma is used as the decimal marker. National foreword This document (EN 16272-3-2:2014) has been prepared by Technical Committee CEN/TC 256 “Railway applications” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the DIN-Normenausschuss Fahrweg u

7、nd Schienenfahrzeuge (DIN Standards Committee Railway), Working Committee NA 087-00-01-11 UA Lrm-schutzwnde an Schienenwegen. This standard is based on the English reference version. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16272-3-2 July 2014 ICS 17.140.30; 93.080.30 English Version Rai

8、lway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 3-2: Normalized railway noise spectrum and single number ratings for direct field applications Applications ferroviaires - Voie - Disposit

9、ifs de rduction du bruit - Mthode dessai pour la dtermination des performances acoustiques - Partie 3-2 : Spectre de bruit ferroviaire normalis et indices uniques dvaluation pour des applications en champ direct Bahnanwendungen - Oberbau - Lrmschutzwnde und verwandte Vorrichtungen zur Beeinflussung

10、der Luftschallausbreitung - Prfverfahren zur Bestimmung der akustischen Eigenschaften - Teil 3-2: Standardisiertes Schienenverkehrslrmspektrum und Einzahl-Angaben fr gerichtete Schallfelder This European Standard was approved by CEN on 30 April 2014. CEN members are bound to comply with the CEN/CENE

11、LEC 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 o

12、r 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 off

13、icial 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

14、, 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 CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of

15、 exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16272-3-2:2014 EEN 16272-3-2:2014(E)2 Contents Foreword 3 Introduction . 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Normalized railway noise spectrum. 6 5 Single-number rating

16、of sound reflection index DLRI7 6 Single-number ratings of sound insulation index DLSI8 6.1 General 8 6.2 Acoustic elements . 8 6.3 Posts . 8 6.4 Global 9 7 Single-number ratings of sound diffraction index difference DLDI. 9 7.1 General 9 7.2 Single-number rating of sound diffraction index differenc

17、e DLDI,refl. 9 7.3 Single-number rating of sound diffraction index difference DLDI,abs10 7.4 Single-number rating of sound diffraction index difference DLDI,situ10 8 Expression of results 10 Annex A (informative) Guidance note on use of the single-number rating of sound reflection index DLRI. 12 Ann

18、ex B (informative) Guidance note on use of the single-number rating of airborne sound insulation index DLSI13 Annex C (informative) Guidance note on use of the single-number rating of sound diffraction index difference DLDI14 DINEN 16272-3-2:2014-10PageEN 16272-3-2:2014 (E) 3 Foreword This document

19、(EN 16272-3-2:2014) has been prepared by Technical Committee CEN/TC 256 “Railway applications”, the secretariat of which is held by DIN. 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 January 201

20、5 and conflicting national standards shall be withdrawn at the latest by January 2015. 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.

21、 This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This European Standard is one of the series EN 16272, Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for d

22、etermining the acoustic performance, as listed below: Part 1: Intrinsic characteristics Sound absorption in the laboratory under diffuse sound field conditions; Part 2: Intrinsic characteristics Airborne sound insulation in the laboratory under diffuse sound field conditions; Part 3-1: Normalized ra

23、ilway noise spectrum and single number ratings for diffuse field applications; Part 3-2: Normalized railway noise spectrum and single number ratings for direct field applications (the present document); Part 5: Intrinsic characteristics In situ values of sound reflection under direct sound field con

24、ditions (Technical Specification); Part 6: Intrinsic characteristics In situ values of airborne sound insulation under direct sound field conditions. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europea

25、n Standard: 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, Sloven

26、ia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DINEN 16272-3-2:2014-10EN 16272-3-2:2014(E)4 Introduction This document is to be read in conjunction with prEN 16272-4, CEN/TS 16272-5 and EN 16272-6 and will be applied only to situations as described in those documents (direct sound fi

27、eld). As the two main intrinsic acoustic characteristics of noise barriers and related devices acting on airborne sound propagation in a direct sound field, the sound reflection index and the sound insulation index, are frequency dependent, there is a need to define a reference railway noise spectru

28、m for test purposes. Also the sound diffraction index difference, the main intrinsic acoustic characteristic of added devices, i.e. products which may be added on the top of noise barriers and intended to contribute to sound attenuation acting primarily on the diffracted sound field, is frequency de

29、pendent and there is an analogous need to define a reference railway noise spectrum for test purposes. This European Standard defines the basic properties of railway noise measured at the rail track side in terms of a characteristic normalized railway noise spectrum which is needed to evaluate singl

30、e-number ratings of noise barriers and related devices acting on airborne sound propagation, except those used in reverberant conditions, e.g. inside tunnels or deep trenches. DIN EN 16272-3-2:2014-10 EN 16272-3-2:2014 (E) 5 1 Scope This European Standard specifies a normalized railway noise spectru

31、m for the evaluation and assessment of the acoustic performance of devices designed to reduce airborne railway noise near railways. All noise reducing devices different from noise barriers and related devices acting on airborne sound propagation, e.g. devices for attenuation of ground borne vibratio

32、n and on board devices, are out of the scope of this European Standard. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated refere

33、nces, the latest edition of the referenced document (including any amendments) applies. prEN 16272-4:2014, Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining the acoustic performance Part 4: Intrinsic characteristics In situ

34、 values of sound diffraction under direct sound field conditions CEN/TS 16272-5:2014, Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining the acoustic performance Part 5: Intrinsic characteristics In situ values of sound refl

35、ection under direct sound field conditions EN 16272-6:2014, Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining the acoustic performance Part 6: Intrinsic characteristics In situ values of airborne sound insulation under dire

36、ct sound field conditions 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 noise barrier noise reducing device, which obstructs the direct transmission of airborne sound emanating from railways Note 1 to entry: It may either span or overhang t

37、he railway. Note 2 to entry: Noise barriers are generally made of acoustic and structural elements (3.3 and 3.4). 3.2 cladding noise reducing device, which is attached to a wall or other structure and reduces the amount of sound reflected Note 1 to entry: Claddings are generally made of acoustic and

38、 structural elements (3.3 and 3.4). 3.3 acoustic element element whose primary function is to provide the acoustic performance of the device 3.4 structural element element whose primary function is to support or hold in place acoustic elements DINEN 16272-3-2:2014-10EN 16272-3-2:2014 (E) 6 Note 1 to

39、 entry: In some noise barriers the acoustic function and the structural function cannot be clearly separated and attributed to different components. 3.5 added device added component that influences the acoustic performance of the original noise-reducing device (acting primarily on the diffracted ene

40、rgy) 3.6 normalized railway noise spectrum spectrum that is used for the calculation of the acoustic performance of noise barriers and related devices acting on airborne sound propagation near railways, in terms of single-number ratings of sound reflection index, sound insulation index and sound dif

41、fraction index difference, as applicable Note 1 to entry: The spectrum is expressed in terms of relative A-weighted sound pressure levels in decibels, for one-third octave bands, Li, in the frequency range from 100 Hz to 5 kHz. 3.7 one-third octave bands level Lirelative A-weighted sound pressure le

42、vels in decibels, of a normalized railway noise spectrum for one-third octave bands with centre frequency range fi4 Normalized railway noise spectrum The normalized railway noise spectrum shown in Table 1 shall be used to assess the acoustic performance of noise barriers and related devices acting o

43、n airborne sound propagation near railways. DIN EN 16272-3-2:2014-10 EN 16272-3-2:2014 (E) 7 Table 1 Normalized railway noise spectrum fiHz Lirailways dB 100 - 27 125 - 25 160 - 23 200 - 21 250 - 19 315 - 17 400 - 15 500 - 13 630 - 12 800 - 11 1 000 - 10 1 250 - 9 1 600 - 9 2 000 - 9 2 500 - 9 3 150

44、 - 10 4 000 - 13 5 000 - 17 5 Single-number rating of sound reflection index DLRIA single-number rating shall be derived to indicate the performance of the product related to sound reflection index. The individual sound reflection index values shall be weighted according to the normalized railway no

45、ise spectrum defined in Table 1. The single-number rating of sound reflection index DLRI, in decibels, is given by: =181,0181,01010lg10miLmiLiRIiiRIDL (1) where RIiis the sound reflection index measured in front of the acoustic elements, in the i-th one-third octave band; m is the number of the lowe

46、st reliable one-third octave frequency band; Liis the relative A-weighted sound pressure levels (dB) of the normalized railway noise spectrum, as defined in Table 1, in the i-th one-third octave band. For product qualification tests in laboratory conditions, the single number rating DLRIshall be cal

47、culated for samples of minimum dimensions of 4 m x 4 m. DIN EN 16272-3-2:2014-10 EN 16272-3-2:2014(E)8 The RIivalues to be inserted in Formula (1) are the spatial averaged values of the sound reflection index according to Table 2 of CEN/TS 16272-5:2014. In some cases the ratio of the summation terms

48、 in the expression of DLRIcan exceed 1 which precludes the correct calculation of DLRI. For this reason the maximum value of this ratio shall be limited to 0,99. NOTE Annex A provides guidance to the use of the single-number rating of sound reflection index. 6 Single-number ratings of sound insulation index DLSI6.1 General Whenever possible, three single-number ratings shall be derived from measurements to indicate the performance of the