DIN EN 1793-1-2017 Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 1 Intrinsic characteristics of sound absorption under diffuse s.pdf

1、July 2017 English price group 13No 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!%gg/“2686812ww

2、w.din.deDIN EN 1793-1Road traffic noise reducing devices Test method for determining the acoustic performance Part 1: Intrinsic characteristics of sound absorption under diffuse sound field conditions;English version EN 17931:2017,English translation of DIN EN 1793-1:2017-07Lrmschutzvorrichtungen an

3、 Straen Prfverfahren zur Bestimmung der akustischen Eigenschaften Teil 1: Produktspezifische Merkmale der Schallabsorption in diffusen Schallfeldern;Englische Fassung EN 17931:2017,Englische bersetzung von DIN EN 1793-1:2017-07Dispositifs de rduction du bruit du trafic routier Mthode dessai pour la

4、dtermination de la performance acoustique Partie 1: Caractristiques intrinsques de labsorption acoustique dans des conditions de champ acoustique diffus;Version anglaise EN 17931:2017,Traduction anglaise de DIN EN 1793-1:2017-07SupersedesDIN EN 17931:201304www.beuth.deDTranslation by DIN-Sprachendie

5、nst.In case of doubt, the German-language original shall be considered authoritative.Document comprises 28 pages 06.17 2 A comma is used as the decimal marker. National foreword This document (EN 1793-1:2017) has been prepared by Technical Committee CEN/TC 226 “Road equipment” (Secretariat: AFNOR, F

6、rance). 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 “Noise reducing devices (national mirror committee to CEN/TC 226/WG 6)”. At the beginning of 2013, the responsi

7、ble German Working Committee decided to make a change to the German titles of the DIN EN 1793 series of standards. It was decided to change the German term Lrmschutzeinrichtung to Lrmschutzvorrichtung (noise reducing device) in all of the titles. The German titles in the series have thus been modifi

8、ed. Some inconsistencies will remain as regards these titles (e.g. in the Normative References or Bibliographies) until all of the standards in the DIN EN 1793 series and other related standards are revised. Amendments This standard differs from DIN EN 1793-1:2013-04 as follows: a) the description o

9、f the test arrangement has been amended; b) the method for determining sound absorption coefficients in each one-third octave band, according to EN ISO 354, has been modified: the Sabine absorption coefficient Sihas been replaced by a new absorption coefficient NRD,ithat is specific to noise reducin

10、g devices and which takes account of the volume of the test sample (a new coefficient NRD,i can be derived from Si); c) the contents of the test report have been defined in more detail; d) the declaration of the measurement uncertainty and the related confidence level are now mandatory. The reported

11、 uncertainties have an impact on the determination of informative categories of single number rating performance; depending on the performance of the product, this could potentially result in products being downgraded to a lower category. As a result, the informative annex addressing categories of s

12、ingle number rating has been removed. The performance of the noise reducing device is, from now on, only to be reported in terms of the numeric values of the single number rating; e) a detailed example has been added (Annex C). Previous editions DIN EN 1793-1: 1997-11, 2013-04 DIN EN 1793-1:2017-07

13、EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1793-1 March 2017 ICS 17.140.30; 93.080.30 Supersedes EN 1793-1:2012English Version Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 1: Intrinsic characteristics of sound absorption under diffuse so

14、und field conditions Dispositifs de rduction du bruit du trafic routier - Mthode dessai pour la dtermination de la performance acoustique - Partie 1 : Caractristique intrinsques de labsorption acoustique dans des conditions de champ acoustique diffus Lrmschutzvorrichtungen an Straen - Prfverfahren z

15、urBestimmung der akustischen Eigenschaften - Teil 1: Produktspezifische Merkmale der Schallabsorption in diffusen Schallfeldern This European Standard was approved by CEN on 6 February 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for

16、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 three

17、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 bodie

18、s 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, Slove

19、nia, 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 2017 CEN All rights of exploitation in any form and by any means reserved

20、worldwide for CEN national Members. Ref. No. EN 1793-1:2017 EEN 1793-1:2017(E)2Contents Page European foreword . 3 Introduction 5 1 Scope 7 2 Normative references 7 3 Symbols and abbreviations . 7 4 Test arrangement 8 5 Test procedure and evaluation . 13 5.1 Test method . 13 5.2 Single number rating

21、 of sound absorption DL,NRD. 16 6 Test report 16 6.1 Expression of results . 16 6.2 Further information 17 Annex A (informative) Guidance note on the use of the single number rating DL,NRD18 Annex B (informative) Measurement uncertainty 19 B.1 General . 19 B.2 Measurement uncertainty based upon repr

22、oducibility data . 19 Annex C (informative) Example test report . 20 C.1 Overview . 20 C.2 Test object (example) . 21 C.3 Test situation (example) . 22 C.3.1 Test room and test arrangement 22 C.3.2 Test equipment and test procedures 23 C.3.3 Test conditions 24 C.4 Test results (example) . 24 Bibliog

23、raphy . 26 DIN EN 1793-1:2017-07 EN 1793-1:2017 (E) 3European foreword This document (EN 1793-1:2017) 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 pu

24、blication of an identical text or by endorsement, at the latest by September 2017, and conflicting national standards shall be withdrawn at the latest by September 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall no

25、t be held responsible for identifying any or all such patent rights. This document supersedes EN 1793-1:2012. With respect to the superseded document, the following changes have been made: the description of the test arrangement has been improved; the method for determining sound absorption coeffici

26、ents in each one-third octave band, as described in EN ISO 354, has been modified: the Sabine absorption coefficient Sihas been replaced by a new absorption coefficient NRD,ithat is specific to noise reducing devices and which takes account of the volume of the test sample (the new coefficient NRD,i

27、might be derived from Si); the contents of the test report have been better defined; the declaration of the measurement uncertainty and the related confidence level is now mandatory. The reported uncertainties have an impact on the determination of informative categories of single number rating perf

28、ormance; depending on the performance of the product this could potentially result in products being downgraded to a lower category. As a result, the informative annex addressing categories of single number rating has been removed. The performance of the noise reducing device is, from now on, only t

29、o be reported in terms of the numeric values of the single number rating; a detailed example is presented (Annex C). EN 1793-1 is part of a series and should be read in conjunction with the following: EN 1793-2, Road traffic noise reducing devices Test method for determining the acoustic performance

30、 Part 2: Intrinsic characteristics of airborne sound insulation 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 met

31、hod 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 sound reflection under direct so

32、und field conditions; DIN EN 1793-1:2017-07 EN 1793-1:2017 (E) 4 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

33、-CENELEC Internal Regulations, 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, Hungar

34、y, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 1793-1:2017-07 EN 1793-1:2017 (E) 5 Introduction Where a sound reflecting surface is install

35、ed along a road, it may be effective to use sound absorbing devices on its traffic side to reduce additional noise nuisance caused by reflected sound. This treatment may be needed in the presence of the following: noise barriers, rocks or retaining walls that can reflect sound waves toward unprotect

36、ed areas; vertical cuttings or reflective surfaces that face each other; tunnels and their approaches; traffic passing close to a barrier where reflections between the vehicles and the barrier may reduce effectiveness. This European Standard specifies a test method for qualifying the sound absorptio

37、n performance of noise reducing devices designed for roads (a measure of intrinsic performance). It is not concerned with determining insertion loss (extrinsic performance) which depends on additional factors which are not related to the product itself, e.g. the dimensions of the barrier and quality

38、 of installation work and site factors such as ground impedance, site geometry etc. The test is designed to allow the intrinsic sound absorption performance of the device to be measured under diffuse sound field conditions; the resulting rating should aid the selection of devices for particular road

39、side applications. The measurement results of this method for sound absorption are not directly comparable with the results of the in situ method (EN 1793-5), mainly because the present method uses a diffuse sound field, while the in situ method assumes a directional sound field. The test method des

40、cribed in the present document should not be used to determine the intrinsic characteristics of sound absorption for noise reducing devices to be installed on roads under non-reverberant conditions. Research studies suggest that some correlation exists between laboratory data, measured according to

41、EN 1793-5 and laboratory data, measured according to the method described in this European Standard 1, 2, 3, 4. For the purpose of this European Standard, reverberant conditions are defined based on the envelope, e, across the road formed by the device under test, trench sides or buildings (the enve

42、lope 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, w, is less than or equal to 25 %, i.e. reverberant conditions occur when w/e 0,25, where e = (w + h1+ h2) or e = (w + h1) a

43、s per Figure 1. This method 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 1793-1:2017-07 EN 1793-1:2017 (E) 6 a) Partial cover on bo

44、th sides of the road; envelope, e = w+h1+h2b) Partial cover on one side of the road; envelope, e = w+h1c) Deep trench; envelope, e = w+h1+h2d) Tall barriers or buildings; envelope, e = w+h1+h2Key r road surface w width of open space NOTE Figure 1 is not to scale. Figure 1 Sketch of the reverberant c

45、ondition check in four cases DIN EN 1793-1:2017-07 EN 1793-1:2017 (E) 7 1 Scope This European Standard specifies the laboratory method for measuring the sound absorption performance of road traffic noise reducing devices in reverberant conditions. It covers the assessment of the intrinsic sound abso

46、rption performance of devices that can reasonably be assembled inside the testing facility described in EN ISO 354. This method is not intended for the determination of the intrinsic characteristics of sound absorption of noise reducing devices to be installed on roads in non-reverberant conditions.

47、 The test method in EN ISO 354 referred to in this European Standard excludes devices that act as weakly damped resonators. Some devices will depart significantly from these requirements and in these cases, care is needed in interpreting the results. 2 Normative references The following documents, i

48、n 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 references, the latest edition of the referenced document (including any amendments) applies. EN 1793-3, Road traffic noise red

49、ucing devices - Test method for determining the acoustic performance - Part 3: Normalized traffic noise spectrum EN ISO 354:2003, Acoustics - Measurement of sound absorption in a reverberation room (ISO 354:2003) ISO 9613-1, Acoustics Attenuation of sound during propagation outdoors Part 1: Calculation of the absorption of sound by the atmosphere 3 Symbols and abbreviations For the purpose