BS PD CEN TS 16272-7-2015 Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining the acoustic performance Exi.pdf

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1、BSI Standards PublicationRailway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining the acoustic performancePart 7: Extrinsic characteristics In situ values of insertion lossPD CEN/TS 16272-7:2015National forewordThis Published Docu

2、ment is the UK implementation of CEN/TS 16272-7:2015.The UK participation in its preparation was entrusted to Technical CommitteeRAE/2, Railway Applications - Track.The UK committee draws users attention to the distinction between normativeand informative elements, as defined in Clause 3 of the CEN/

3、CENELEC InternalRegulations, Part 3. Normative: Requirements conveying criteria to be fulfilled if compliance with thedocument is to be claimed and from which no deviation is permitted. Informative: Information intended to assist the understanding or use of the document. Informative annexes do not c

4、ontain requirements, except as optionalrequirements, and are not mandatory. For example, a test method may containrequirements, but there is no need to comply with these requirements to claimcompliance with the standard. When speeds in km/h require unit conversion for use in the UK, users are advise

5、dto use equivalent values rounded to the nearest whole number. The use ofabsolute values for converted units should be avoided in these cases. Please referto the table below for agreed conversion figures: A list of organizations represented on this committee can be obtained on requestto its secretar

6、y.This publication does not purport to include all the necessary provisions of a con-tract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 87233 4ICS 93.100Compliance with a British Standard cannot confe

7、r immunity from legalobligations.This Published Document was published under the authority of the StandardsPolicy and Strategy Committee on 31 October 2015.Amendments/corrigenda issued since publicationDate Text affectedPUBLISHED DOCUMENTPD CEN/TS 16272-7:2015INS, RST and ENE speed conversionskm/h m

8、ph53100 60200 125INS, RST and ENE speed conversionsmph5 360125TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 16272-7 September 2015 ICS 93.100 English Version Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test

9、 method for determining the acoustic performance - Part 7: Extrinsic characteristics - In situ values of insertion loss Applications ferroviaires - Voie - Dispositifs de rduction du bruit - Mthode dessai pour la dtermination des performances acoustiques - Partie 7 : Caractristiques extrinsques - Val

10、eurs in situ de la perte par insertion Bahnanwendungen - Oberbau - Lrmschutzwnde und verwandte Vorrichtungen zur Beeinflussung der Luftschallausbreitung - Prfverfahren zur Bestimmung der akustischen Eigenschaften - Teil 7: Fremdspezifische Merkmale - In-situ-Werte zur Einfgungsdmpfung This Technical

11、 Specification (CEN/TS) was approved by CEN on 17 August 2015 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be

12、converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the

13、 CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. 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

14、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN

15、-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 16272-7:2015 EPD CEN/TS 16272-7:2015CEN/TS 16272-7:2015 (E) 2 Contents Page European foreword . 4 Introduction 5

16、 1 Scope 6 2 Normative references 6 3 Terms and definitions . 7 4 Symbols and abbreviations . 9 5 Methods . 10 5.1 General . 10 5.2 Direct measurement method . 10 5.3 Indirect measurement method . 10 6 Instrumentation . 10 6.1 Sound level meter and analyzer . 10 6.2 Sound calibrator . 10 6.3 Windscr

17、een 11 6.4 Other instrumentation system 11 6.5 Meteorological equipment 11 7 Acoustic environment 11 7.1 General . 11 7.2 Terrain profile and ground surface equivalence 11 7.3 Meteorological conditions 12 7.3.1 General . 12 7.3.2 Wind 12 7.3.3 Temperature 13 7.3.4 Humidity 13 7.3.5 Cloud cover . 13

18、7.3.6 Others . 14 7.3.7 Background noise 14 8 Sources and source equivalence . 14 8.1 Source type . 14 8.1.1 General . 14 8.1.2 Source type A . 14 8.1.3 Source type B . 14 8.1.4 Source type C 14 8.2 Source equivalence 15 8.2.1 General . 15 8.2.2 Operational parameters 16 8.2.3 Reference microphone p

19、osition . 16 9 Measurement procedure . 17 9.1 General planning 17 9.1.1 Measurement . 17 9.1.2 Receiver positions 17 9.1.3 Quantities to be measured 17 PD CEN/TS 16272-7:2015CEN/TS 16272-7:2015 (E) 2 Contents Page European foreword . 4 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms and de

20、finitions . 7 4 Symbols and abbreviations . 9 5 Methods . 10 5.1 General . 10 5.2 Direct measurement method . 10 5.3 Indirect measurement method . 10 6 Instrumentation . 10 6.1 Sound level meter and analyzer . 10 6.2 Sound calibrator . 10 6.3 Windscreen 11 6.4 Other instrumentation system 11 6.5 Met

21、eorological equipment 11 7 Acoustic environment 11 7.1 General . 11 7.2 Terrain profile and ground surface equivalence 11 7.3 Meteorological conditions 12 7.3.1 General . 12 7.3.2 Wind 12 7.3.3 Temperature 13 7.3.4 Humidity 13 7.3.5 Cloud cover . 13 7.3.6 Others . 14 7.3.7 Background noise 14 8 Sour

22、ces and source equivalence . 14 8.1 Source type . 14 8.1.1 General . 14 8.1.2 Source type A . 14 8.1.3 Source type B . 14 8.1.4 Source type C 14 8.2 Source equivalence 15 8.2.1 General . 15 8.2.2 Operational parameters 16 8.2.3 Reference microphone position . 16 9 Measurement procedure . 17 9.1 Gene

23、ral planning 17 9.1.1 Measurement . 17 9.1.2 Receiver positions 17 9.1.3 Quantities to be measured 17 PD CEN/TS 16272-7:2015CEN/TS 16272-7:2015 (E) 3 9.2 Determination of barrier insertion loss . 18 9.2.1 Direct measurement method . 18 9.2.2 Indirect measurement method 18 10 Measurement uncertainty

24、. 19 11 Test report 19 11.1 Information to be recorded. 19 11.1.1 Type of method 19 11.1.2 Instrumentation 19 11.1.3 Acoustic environment . 19 11.1.4 Sound source 19 11.1.5 Barrier to be tested 19 11.1.6 Site layout 19 11.1.7 Acoustical data . 20 11.2 Expression of results . 20 11.3 Further informat

25、ion 20 Annex A (informative) Measurement uncertainty . 21 A.1 General . 21 A.2 Measurement uncertainty based upon reproducibility data . 21 Bibliography . 22 PD CEN/TS 16272-7:2015CEN/TS 16272-7:2015 (E) 4 European foreword This document (CEN/TS 16272-7:2015) has been prepared by Technical Committee

26、 CEN/TC 256 “Railway applications”, the secretariat of which is held by DIN. 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. This Tech

27、nical Specification is one of the series EN 16272, Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining the acoustic performance, as listed below: Part 1: Intrinsic characteristics Sound absorption in the laboratory under diff

28、use sound field conditions; Part 2: Intrinsic characteristics Airborne sound insulation in the laboratory under diffuse sound field conditions; Part 3-1: Normalized railway noise spectrum and single number ratings for diffuse field applications; Part 3-2: Normalized railway noise spectrum and single

29、 number ratings for direct field applications; Part 4: Intrinsic characteristics In situ values of sound diffraction under direct sound field conditions currently at Enquiry stage; Part 5: Intrinsic characteristics In situ values of sound reflection under direct sound field conditions; Part 6: Intri

30、nsic characteristics In situ values of airborne sound insulation under direct sound field conditions; Part 7: Extrinsic characteristics In situ values of insertion loss the present document. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following coun

31、tries are bound to announce this Technical Specification: 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, Norwa

32、y, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. PD CEN/TS 16272-7:2015CEN/TS 16272-7:2015 (E) 4 European foreword This document (CEN/TS 16272-7:2015) has been prepared by Technical Committee CEN/TC 256 “Railway applications”, the secretari

33、at of which is held by DIN. 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. This Technical Specification is one of the series EN 16272

34、, Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining the acoustic performance, as listed below: Part 1: Intrinsic characteristics Sound absorption in the laboratory under diffuse sound field conditions; Part 2: Intrinsic cha

35、racteristics Airborne sound insulation in the laboratory under diffuse sound field conditions; Part 3-1: Normalized railway 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; Pa

36、rt 4: Intrinsic characteristics In situ values of sound diffraction under direct sound field conditions currently at Enquiry stage; Part 5: Intrinsic characteristics In situ values of sound reflection under direct sound field conditions; Part 6: Intrinsic characteristics In situ values of airborne s

37、ound insulation under direct sound field conditions; Part 7: Extrinsic characteristics In situ values of insertion loss the present document. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specif

38、ication: 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,

39、 Spain, Sweden, Switzerland, Turkey and the United Kingdom. PD CEN/TS 16272-7:2015CEN/TS 16272-7:2015 (E) 5 Introduction The purpose of insertion loss measurements is to have an indication of the “efficiency” of the complete installation in attenuating noise from a technical point of view, as is usu

40、ally done with calculations. The insertion loss is not intended to compare products; in fact, it is site-dependent, so that the same product may give different results when installed on different sites. In order to be representative, these measurements need to be done in well-defined conditions rega

41、rding: the noise source (number and type of trains, speed, etc.); the meteorological window; the measurement time; the reference time, i.e. the time over which the measured insertion loss is evaluated based on the measurement results. When it is not possible to carry out measurements before the cons

42、truction of the noise barrier, an “equivalent” site is used for the “before” measurements. The assessment of insertion loss limiting values is out of the scope of this Technical Specification. PD CEN/TS 16272-7:2015CEN/TS 16272-7:2015 (E) 6 1 Scope This Technical Specification specifies methods for

43、the determination of insertion loss of outdoor noise barriers intended to shield railway noise. It specifies detailed procedures for in situ measurement of barrier insertion loss including microphone positions, source conditions and acoustic environments of the measurement sites. This Technical Spec

44、ification allows one to measure the insertion loss of a given noise barrier at a given site including given meteorological conditions. It does not make it possible to compare insertion loss values of an equivalent barrier at a different site. It can be used for comparing insertion loss values of dif

45、ferent types of barriers at the same site under given meteorological conditions by the “direct method”. This Technical Specification gives a method for determining insertion loss: a) from the level difference before and after the installation of noise barriers (the “direct method”); b) when the dire

46、ct method is not applicable, because a barrier has already been installed, using an “indirect method“ to estimate the sound pressure levels before installation of the barrier by measurement at another site which has been judged to be equivalent. For equivalent sites, a close match is required in sou

47、rce characteristics, microphone locations, terrain profiles ground surface characteristics, surrounding artificial structures and meteorological conditions. This Technical Specification prescribes principles for ensuring that sufficiently equivalent conditions are maintained between “before” and “af

48、ter” cases to permit certain, reliable and repeatable determination of barrier insertion loss. This Technical Specification does not cover the determination of the intrinsic acoustic characteristics of the barrier, for example the sound insulation index and the sound absorption coefficient. The equi

49、valent continuous A-weighted sound pressure level and one-third-octave band sound pressure level are used as noise descriptors. This Technical Specification can be used for routine determination of barrier performance or for engineering or diagnostic evaluation. It can be used in situations where the barrier is to be installed or has already been installed. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document an