1、December 2016 English price group 17No 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 93.100!%b0“2596313www.din.deDIN
2、 EN 16272-4Railway 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 values of sound diffraction under direct sound field;English version EN 162724:2016,English tra
3、nslation of DIN EN 16272-4:2016-12Bahnanwendungen Oberbau Lrmschutzwnde und verwandte Vorrichtungen zur Beeinflussung der Luftschallausbreitung Prfverfahren zur Bestimmung der akustischen Eigenschaften Teil 4: Produktspezifische Merkmale InsituWerte zur Schallbeugung in gerichteten Schallfeldern;Eng
4、lische Fassung EN 162724:2016,Englische bersetzung von DIN EN 16272-4:2016-12Applications ferroviaires Voie Dispositifs de rduction du bruit Mthode dessai pour la dtermination des performances acoustiques Partie 4: Caractristiques intrinsques Valeurs in situ de la diffraction acoustique dans des con
5、ditions de champ acoustique direct;Version anglaise EN 162724:2016,Traduction anglaise de DIN EN 16272-4:2016-12www.beuth.deDocument comprises 38 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.12.16 DIN EN 16272-4:2016-12 2 A
6、comma is used as the decimal marker. National foreword This document (EN 16272-4:2016) has been prepared by Technical Committee CEN/TC 256 “Railway applications” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Fahrweg und Schienenfahrzeuge
7、 (DIN Standards Committee Railway), Working Committee NA 087-00-01-11 UA Lrmschutzwnde an Schienenwegen. This standard is based on the English reference version. In addition to the legal units of measurement, this standard also uses the unit “inch” (“). It should, however, be noted that the Gesetz b
8、er Einheiten im Messwesen (German Law on units in metrology) prohibits the use of this unit for official and commercial purposes in Germany. Conversion: Unit not permitted Unit permitted Conversion “ (inch) mm 1 inch = 25,4 mm The DIN Standard corresponding to the International Standard referred to
9、in this document is as follows: ISO 13472-1 DIN ISO 13472-1 DIN EN 16272-4:2016-12 3 National Annex NA (informative) Bibliography DIN ISO 13472-1, Acoustics Measurement of sound absorption properties of road surfaces in situ Part 1: Extended surface method DIN EN 16272-4:2016-12 4 This page is inten
10、tionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16272-4 September 2016 ICS 93.100 English Version Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 4: Intrinsic char
11、acteristics - In situ values of sound diffraction under direct sound field Applications ferroviaires - Voie - Dispositifs de rduction du bruit - Mthode dessai pour la dtermination des performances acoustiques - Partie 4:Caractristiques intrinsques - Valeurs in situ de la diffraction acoustique dans
12、des conditions de champ acoustique direct Bahnanwendungen - Oberbau - Lrmschutzwnde und verwandte Vorrichtungen zur Beeinflussung der Luftschallausbreitung - Prfverfahren zur Bestimmung der akustischen Eigenschaften - Teil 4: Produktspezifische Merkmale - In -situ -Werte zur Schallbeugung in gericht
13、eten Schallfeldern This European Standard was approved by CEN on 25 March 2016. CEN members 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 bi
14、bliographical 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 official versions (English, French, German). A version in any other language made by translation under the resp
15、onsibility 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 bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Re
16、public of Macedonia, France, Germany, Greece, 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 NORM
17、ALISATION 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 reserved worldwide for CEN national Members. Ref. No. EN 16272-4:2016 EContents Page European foreword . 4 Introduction 5 1 Scope
18、 6 2 Normative references 6 3 Terms and definitions . 7 4 Symbols and abbreviations . 9 5 Sound diffraction index difference measurements . 10 5.1 General principle 10 5.2 Dimensions and specifications 15 5.2.1 Added devices 15 5.2.2 Reference walls . 15 5.2.3 In situ tests 16 5.3 Positions of the s
19、ound source 16 5.4 Position of the microphone(s) . 16 5.5 Free-field measurements 17 5.6 Measured quantity . 18 5.7 Measuring equipment 18 5.7.1 Components of the measuring system 18 5.7.2 Sound source 20 5.7.3 Test signal . 20 5.8 Data processing . 20 5.8.1 Calibration 20 5.8.2 Sample rate . 21 5.8
20、.3 Background noise 21 5.8.4 Measurement points . 21 5.8.5 Adrienne temporal window . 21 5.8.6 Placement of the Adrienne temporal window . 22 5.8.7 Low frequency limit and sample size 24 5.9 Positioning of the measuring equipment 24 5.9.1 Selection of the measurement positions 24 5.9.2 Reflecting ob
21、jects . 25 5.9.3 Safety considerations 25 5.10 Sound diffraction index difference 25 5.11 Sample surface and meteorological conditions 25 5.11.1 Condition of the sample surface . 25 5.11.2 Wind 26 5.11.3 Air temperature 26 6 Measurement uncertainty 26 7 Measuring procedure . 26 8 Test report 27 8.1
22、Expression of results . 27 8.2 Further information 27 2DIN EN 16272-4:2016-12 EN 16272-4:2016 (E) Annex A (informative) Indoor measurements for product qualification 29 A.1 General . 29 A.2 Parasitic reflections . 29 A.3 Reverberation time of the room 29 Annex B (informative) Measurement uncertainty
23、 . 30 B.1 General . 30 B.2 Expression for the calculation of sound diffraction index . 30 B.3 Contributions to measurement uncertainty . 31 B.4 Expanded uncertainty of measurement . 32 B.5 Measurement uncertainty based upon reproducibility data . 32 Bibliography . 33 3DIN EN 16272-4:2016-12 EN 16272
24、-4:2016 (E) European foreword This document (EN 16272-4:2016) 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
25、 endorsement, at the latest by March 2017, and conflicting national standards shall be withdrawn at the latest by March 2017. 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 ide
26、ntifying any or all such patent rights. 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 determining the acoustic performance” as listed below: Part 1: Intrinsic characteristics So
27、und 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 railway noise spectrum and single number ratings for diffuse field applications Part 3-2: Norm
28、alized railway noise spectrum and single number ratings for direct field applications Part 4: Intrinsic characteristics In situ values of sound diffraction under direct sound field conditions Part 5: Intrinsic characteristics In situ values of sound reflection under direct sound field conditions Par
29、t 6: Intrinsic characteristics In situ values of airborne sound insulation under direct sound field conditions Part 7: Extrinsic characteristics In situ values of insertion loss This document should be read in conjunction with: EN 16272-3-2, Railway applications Track Noise barriers and related devi
30、ces 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 EN 16272-6, Railway applications Track Noise barriers and related devices acting on airborne sound propaga
31、tion 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 Internal Regulations, the national standards organizations of the following countries are bound to
32、implement this European 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, Rom
33、ania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. N1)National footnote: This document has been published as a CEN/TS. N1)4DIN EN 16272-4:2016-12 EN 16272-4:2016 (E) Introduction Part of the market for railway noise barriers and related devices acting on airborne so
34、und propagation includes products to be added to the top of noise barriers and intended to contribute to sound attenuation acting primarily on the diffracted sound field. These products are called here “added devices”. This standard has been developed to specify a test method for determining the aco
35、ustic performance of added devices. The test method can be applied in situ, i.e. where the railway noise barriers and the added devices are installed. The method can be applied without damaging the railway noise barriers or the added devices. The method can be used to qualify products before the ins
36、tallation along railways as well as to verify the compliance of installed added devices to design specifications. Repeated application of the method can be used to verify the long term performance of added devices. This method could be used to qualify added devices for other applications, e.g. to be
37、 installed along roads or nearby industrial sites. In this case, special care has to be taken in considering the location of the noise sources and the single-number ratings should be calculated using an appropriate spectrum. No other national or international standard exists about the subject of thi
38、s standard. 5DIN EN 16272-4:2016-12 EN 16272-4:2016 (E) 1 Scope This European Standard describes a test method for determining the intrinsic characteristics of sound diffraction of added devices installed on the top of railway noise barriers. The test method prescribes measurements of the sound pres
39、sure level at several reference points near the top edge of a noise barrier with and without the added device installed on its top. The intrinsic effectiveness of the added device is calculated as the difference between the measured values with and without the added devices, correcting for any chang
40、e in height. In other words, the method described here gives the acoustic benefit of changing the shape and materials of the top edge over a simple barrier of the same height. This is an intrinsic characteristic of the added device, provided that the source and receiver positions are standardized. I
41、n practice, when the added device is placed over an existing barrier, it raises the height and this provides additional screening, depending on the source and receiver positions; this additional screening is not considered in this European Standard. The test method is intended for the following appl
42、ications: preliminary qualification, outdoors or indoors, of added devices to be installed on noise barriers; determination of the sound diffraction index difference of added devices in actual use; comparison of design specifications of an added device with actual performance data after the completi
43、on of the construction work; verification of the long term performance of added devices (with a repeated application of the method); interactive design process of new products, including the formulation of installation manuals. The test method can be applied both in situ and on samples purposely bui
44、lt to be tested using the method described here. Results are expressed as a function of frequency, in one-third octave bands between 100 Hz and 5 kHz. If it is not possible to get valid measurements results over the whole frequency range indicated, the results shall be given in the restricted freque
45、ncy range and the reasons for the restriction(s) shall be clearly reported. A single-number rating is calculated from frequency data. For indoor measurements, see Annex A. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispe
46、nsable 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 16272-3-2, Railway applications Track Noise barriers and related devices acting on airborne sound propagation
47、 Test method for determining the acoustic performance Part 3-2: Normalized railway noise spectrum and single number ratings for direct field applications EN 16272-6, Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining the aco
48、ustic performance Part 6: Intrinsic characteristics In situ values of airborne sound insulation under direct sound field conditions EN ISO 354, Acoustics Measurement of sound absorption in a reverberation room (ISO 354) EN 61672-1, Electroacoustics Sound level meters Part 1: Specifications (IEC 6167
49、2-1) 6DIN EN 16272-4:2016-12 EN 16272-4:2016 (E) ISO/IEC Guide 98-3, Uncertainty of measurement 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. 3.1 noise barrier noise reducing device, which obstructs the direct transmission of
