DIN EN 1793-5-2016 en 3071 Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 5 Intrinsic characteristics - In situ values of sound r.pdf

1、October 2016 English price group 23No 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).ICS 17.140.30; 93.080.30!%/“2579912w

2、ww.din.deDIN EN 1793-5Road traffic noise reducing devices Test method for determining the acoustic performance Part 5: Intrinsic characteristics In situ values of sound reflection under direct sound field conditions;English version EN 17935:2016,English translation of DIN EN 1793-5:2016-10Lrmschutzv

3、orrichtungen an Straen Prfverfahren zur Bestimmung der akustischen Eigenschaften Teil 5: Produktspezifische Merkmale InsituWerte der Schallreflexion in gerichteten Schallfeldern;Englische Fassung EN 17935:2016,Englische bersetzung von DIN EN 1793-5:2016-10Dispositifs de rduction du bruit du trafic r

4、outier Mthode dessai pour la dtermination de la performance acoustique Partie 5: Caractristiques intrinsques Valeurs in situ de rflexion acoustique dans des conditions de champ acoustique direct;Version anglaise EN 17935:2016,Traduction anglaise de DIN EN 1793-5:2016-10SupersedesDIN CEN/TS 17935:200

5、308www.beuth.deDocument comprises 62 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.10.16 DIN EN 1793-5:2016-10 2 A comma is used as the decimal marker. National foreword This document (EN 1793-5:2016) has been prepared by Tec

6、hnical Committee CEN/TC 226 “Road equipment” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was DIN-Normenausschuss Bauwesen (DIN Standards Committee Building and Civil Engineering), Working Committee NA 005-10-26 AA Lrmschutzvorrichtungen (SpA zu CEN/TC 226/WG

7、 6), Gemeinschaftsausschuss mit FGSV. As work began on the EN 1793 series of standards, the only existing test methods for sound absorption (Part 1) and airborne sound insulation (Part 2) were derived from building acoustics. As a result, the measurements were carried out in closed laboratory testin

8、g rooms with multiple reflections and not outdoors, as is typical for noise barriers. Yet from the beginning there was a mandate to develop new methods for use in situ (Part 5). The well-known Adrienne methods that resulted from these efforts closely replicate the typical application situations outd

9、oors and were therefore published without delay in the form of a German prestandard and a European technical specification in order to fulfil the need for test methods in situ e.g. for quality control or long-term monitoring of installed noise barriers and to allow experience and empirical values to

10、 be gathered. Ultimately, concrete numerical criteria were formulated in order to distinguish the testing and results for situations with multiple reflections from situations in the field without multiple reflections. Test methods for airborne sound insulation were seen as non-critical and thus imme

11、diately published as European Standard EN 1793-6 and German Standard DIN EN 1793-6. The open questions on testing for sound absorption and sound reflection were only able to be resolved upon the conclusion of the European FuE-Projekts QUIESST (Research and Development Project “Quietening the Environ

12、ment for a Sustainable Surface Transport”) and be taken into account in a separate European Standard EN 1793-5 and a separate German Standard DIN EN 1793-5. Amendments This standard differs from DIN CEN/TS 1793-5:2003-08 as follows: a) the rotating loudspeaker/microphone assembly has been replaced b

13、y a loudspeaker and a 9-microphone square array (the measurement grid); b) the definition of RI has been changed; c) the geometrical divergence correction factor has been changed; d) a new correction factor for sound source directivity has been introduced; e) a new correction factor for gain mismatc

14、h has been introduced; f) the impulse response alignment for signal subtraction has been described in more detail; g) the lowest reliable one-third frequency band has been better defined; DIN EN 1793-5:2016-10 3 h) the way to evaluate the uncertainty of the measurement method from reproducibility da

15、ta has been introduced (Annex A); i) a detailed example is given (Annex B); j) information on the near-field to far-field relationship has been added (Annex C). Previous editions DIN CEN/TS 1793-5: 2003-08 DIN EN 1793-5:2016-10 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUR

16、OPISCHE NORM EN 1793-5 March 2016 ICS 17.140.30; 93.080.30 Supersedes CEN/TS 1793-5:2003English Version Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 5: Intrinsic characteristics - In situ values of sound reflection under direct sound field conditi

17、ons Dispositifs de rduction du bruit du trafic routier - Mthode dessai pour la dtermination de la performance acoustique - Partie 5: Caractristiques intrinsques - Valeurs in situ de rflexion acoustique dans des conditions de champ acoustique direct Lrmschutzvorrichtungen an Straen - Prfverfahren zur

18、 Bestimmung der akustischen Eigenschaften - Teil 5: Produktspezifische Merkmale - In-situ-Werte der Schallreflexion in gerichteten Schallfeldern This European Standard was approved by CEN on 23 January 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate th

19、e 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

20、 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 nationa

21、l 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, Slovak

22、ia, 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 2016 CEN All rights of exploitation in any form and by any means

23、reserved worldwide for CEN national Members. Ref. No. EN 1793-5:2016 EEN 1793-5:2016 (E) 2 Contents European foreword 4 Introduction . 6 1 Scope . 8 2 Normative references . 8 3 Terms and definitions 8 4 Symbols and abbreviations . 13 5 Sound reflection index measurements . 15 5.1 General principle

24、. 15 5.2 Measured quantity 15 5.3 Test arrangement 18 5.4 Measuring equipment . 23 5.4.1 Components of the measuring system . 23 5.4.2 Sound source . 24 5.4.3 Test signal 24 5.5 Data processing 25 5.5.1 Calibration . 25 5.5.2 Sample rate 26 5.5.3 Background noise . 27 5.5.4 Signal subtraction techni

25、que 27 5.5.5 Adrienne temporal window 30 5.5.6 Placement of the Adrienne temporal window 32 5.5.7 Low frequency limit and sample size . 33 5.6 Positioning of the measuring equipment . 35 5.6.1 Maximum sampled area 35 5.6.2 Selection of the measurement positions. 35 5.6.3 Reflecting objects 42 5.6.4

26、Safety considerations. 42 5.7 Sample surface and meteorological conditions . 42 5.7.1 Condition of the sample surface 42 5.7.2 Wind . 42 5.7.3 Air temperature . 42 5.8 Single-number rating of sound reflection DLRI. 42 5.9 Measurement uncertainty . 43 5.10 Measuring procedure 43 5.11 Test report . 44

27、 Annex A (informative) Measurement uncertainty 46 A.1 General 46 A.2 Measurement uncertainty based upon reproducibility data 46 A.3 Standard deviation of repeatability and reproducibility of the sound reflection index . 46 Annex B (informative) Template of test report on sound reflection of road noi

28、se barriers . 48 B.1 Overview 48 B.2 Test setup (example) . 50 B.3 Test object and test situation (example) 51 DIN EN 1793-5:2016-10EN 1793-5:2016 (E) 3 B.4 Test Results (example) 53 B.4.1 Part 1 Results in tabular form 53 B.4.2 Part 2 Results in graphic form 54 B.5 Uncertainty (example) . 54 Annex

29、C (informative) Near field to far field relationship 56 Bibliography . 57 DIN EN 1793-5:2016-10EN 1793-5:2016 (E) 4 European foreword This document (EN 1793-5:2016) has been prepared under the direction of Technical Committee CEN/TC 226 “Road equipment”, by Working Group 6 “Anti-noise devices”, the

30、secretariat of which is held by AFNOR. This document supersedes CEN/TS 1793-5:2003. 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 September 2016, and conflicting national standards shall be with

31、drawn at the latest by September 2016. 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. With respect to the superseded document, the fo

32、llowing changes have been done: the rotating loudspeaker/microphone assembly has been replaced by a loudspeaker and a 9-microphone square array (the measurement grid); the definition of RI has been changed; the geometrical divergence correction factor has been changed; a new correction factor for so

33、und source directivity has been introduced; a new correction factor for gain mismatch has been introduced; the impulse response alignment for signal subtraction has been described in more detail; the lowest reliable one-third frequency band has been better defined; the way to evaluate the uncertaint

34、y of the measurement method from reproducibility data has been introduced (Annex A); a detailed example is given (Annex B); information on the near-field to far-field relationship has been added (Annex C). It should be read in conjunction with: EN 1793-1, Road traffic noise reducing devices - Test m

35、ethod for determining the acoustic performance Part 1: Intrinsic characteristics of sound absorption under diffuse sound field conditions EN 1793-2, Road traffic noise reducing devices - Test method for determining the acoustic performance Part 2: Intrinsic characteristics of airborne sound insulati

36、on 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 reducing devices - Test method for determining the acoustic performance Part 4: Intrin

37、sic characteristics In situ values of sound diffraction 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 DIN EN 1793-5:2016-10EN 1793

38、-5:2016 (E) 5 According to the CEN-CENELEC Internal 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 Macedoni

39、a, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 1793-5:2016-10EN 1793-5:2016 (E) 6 Introduction This document desc

40、ribes a test method for determining the intrinsic characteristics of sound reflection of noise reducing devices designed for roads in non-reverberant conditions (a measure of intrinsic performance). It can be applied in situ, i.e. where the noise reducing devices are installed. The method can be app

41、lied without damaging the surface. The method can be used to qualify products to be installed along roads as well as to verify the compliance of installed noise reducing devices to design specifications. Regular application of the method can be used to verify the long term performance of noise reduc

42、ing devices. The method requires the average of results of measurements taken in different points in front of the device under test and/or for specific angles of incidences. The method is able to investigate flat and non-flat products. The measurements results of this method for sound reflection are

43、 not directly comparable with the results of the laboratory method (e.g. EN 1793-1), mainly because the present method uses a directional sound field, while the laboratory method assumes a diffuse sound field. The test method described in the present document should not be used to determine the intr

44、insic characteristics of sound reflection of noise reducing devices to be installed in reverberant conditions, e.g. claddings inside tunnels or deep trenches. For the purpose of this document reverberant conditions are defined based on the envelope, e, across the road formed by the device under test

45、, trench sides or buildings (the 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 envelope is less than or equal to 25 %, i.e. Reverberant conditions occur when w/e 0,25, where e

46、 = (w+h1+h2) This method introduces a specific quantity, called reflection index, to define the sound reflection in front of a noise reducing device, while the laboratory method gives a sound absorption coefficient. Laboratory values of the sound absorption coefficient can be converted to convention

47、al values of a reflection coefficient taking the complement to one. In this case, research studies suggest that some correlation exists between laboratory data, measured according to EN 1793-1 and field data, measured according to the method described in the present document 7, 10, 20, 21. This meth

48、od may 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 should be calculated using an appropriate spectrum. DIN EN 1793-5:2016-10EN 1793-5:2016 (E) 7 (a) Partial cover on both sides of the road; env

49、elope, e = w+h1+h2. (b) Partial cover on one side of the road; envelope, e = w+h1. (c) Deep trench; envelope, e = w+h1+h2. (d) Tall barriers or buildings; envelope, e = w+h1+h2. Key r road surface; w width of open space NOTE Figure 1 is not to scale. Figure 1 Sketch of the reverberant condition check in four cases DIN EN 1793-5:2016-10EN 1793-5:2016 (E) 8 1 Scope This European Standard describes a test