1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 16272-2:2012Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining the acoustic performancePart 2: I
2、ntrinsic characteristics Airborne sound insulation in the laboratory under diffuse sound conditionsBS EN 16272-2:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 16272-2:2012. The UK participation in its preparation was entrusted to Technical Committee RAE/2
3、, Railway Applications - Track.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Instituti
4、on 2012. Published by BSI Standards Limited 2012.ISBN 978 0 580 74708 3 ICS 17.140.30; 93.100 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2012.Am
5、endments issued since publicationDate Text affectedBS EN 16272-2:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16272-2 October 2012 ICS 93.100 English Version Railway applications - Track - Noise barriers and related devices acting on airborne sound propagation - Test method for determini
6、ng the acoustic performance - Part 2: Intrinsic characteristics - Airborne sound insulation in the laboratory under diffuse sound field conditions Applications ferroviaires - Voie - Dispositifs de rduction du bruit - Mthode dessai pour la dtermination des performances acoustiques - Partie 2: Caractr
7、istiques intrinsques - Isolation au bruit arien en salle rverbrante dans des conditions de champ acoustique diffus Bahnanwendungen - Oberbau - Lrmschutzwnde und verwandte Vorrichtungen zur Beeinflussung der Luftschallausbreitung - Prfverfahren zur Bestimmung der akustischen Eigenschaften - Teil 2: P
8、roduktspezifische Merkmale - Luftschalldmmung (Labormethode) bei diffusen Schallfeldern This European Standard was approved by CEN on 15 September 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the stat
9、us 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 official versions (English, French, Ge
10、rman). 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 bodies of Austria, Belgium, Bulgaria, Croat
11、ia, 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, Spain, Sweden, Switzerland, Turkey and Un
12、ited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16272-2:20
13、12: EBS EN 16272-2:2012EN 16272-2:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definitions .54 Symbols and abbreviations 55 Test arrangement .66 Test procedure and evaluation .87 Measurement uncertainty .88 Test report 98.1 Expression of results 98.2
14、 Further information9Annex A (informative) Measurement uncertainty . 10A.1 General . 10A.2 Measurement uncertainty based upon reproducibility data 10Bibliography . 11BS EN 16272-2:2012EN 16272-2:2012 (E) 3 Foreword This document (EN 16272-2:2012) has been prepared by Technical Committee CEN/TC 256 “
15、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 April 2013, and conflicting national standards shall be withdrawn at the latest by A
16、pril 2013. 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 document has been prepared under a mandate given to CEN by the Europea
17、n 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 determining the acoustic performance“ as listed below: Part 1: Intrinsic char
18、acteristics 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: Normalised railway noise spectrum and single number ratings for diffuse field applications
19、Part 3-2: Normalized railway noise spectrum and single number ratings for direct field applications 1) Part 4: Intrinsic characteristics In situ values of sound diffraction under direct sound field conditions 1) Part 5: Intrinsic characteristics In situ values of sound reflection under direct sound
20、field conditions 2) Part 6: Intrinsic characteristics In situ values of airborne sound insulation under direct sound field conditions 1) Part 7: Extrinsic characteristics In situ values of insertion loss 2)According to the CEN/CENELEC Internal Regulations, the national standards organisations of the
21、 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherla
22、nds, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. 1) In preparation. 2) This document has been prepared as a CEN Technical Specification and is in preparation. BS EN 16272-2:2012EN 16272-2:2012 (E) 4 Introduction Noise barriers ins
23、talled along railways need to provide adequate sound insulation so that sound transmitted directly through the device is not significant compared to the sound diffracted over the top. This European Standard specifies a test method for assessing the airborne sound insulation performance of noise barr
24、iers and related devices acting on airborne sound propagation designed for particular railway applications in reverberant field (a measure of intrinsic performance). It is not concerned with determining sound insulation performance in situ, nor with determining the acoustic efficiency at receiver po
25、sitions (insertion loss), which additionally depend on factors which are not related to the product itself, e.g. the dimensions of the barrier and quality of installation work and site factors such as site geometry, ground impedance, meteorological effects, etc. The test is designed to allow the int
26、rinsic airborne sound insulation performance of the device under test to be measured. The resulting rating should aid the selection of the devices for particular railway applications in reverberant field. The measurements results of this method for airborne sound insulation are comparable but not id
27、entical with the results of the prEN 16272-6 method, mainly because the present method assumes a diffuse sound field, while the prEN 16272-6 method uses a directional sound field. Research studies suggest that a very good correlation exists between data measured according to the method described in
28、the present standard and data measured according to the method described in prEN 16272-6. The test method described in this European Standard should not be used to determine completely the intrinsic characteristics of airborne sound insulation for noise reducing devices to be installed in non-reverb
29、erant conditions, e.g. alongside railways in open space. This method may be used to qualify noise reducing devices for other applications, e.g. to be installed along roads or nearby industrial sites. In such cases, the single-number ratings should be calculated using an appropriate spectrum. This Eu
30、ropean Standard should be read in conjunction with: EN 16272-3-1, Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining the acoustic performance Part 3-1: Normalised railway noise spectrum and single number ratings for diffuse
31、field applications; prEN 16272-6, 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 direct sound field conditions.
32、 BS EN 16272-2:2012EN 16272-2:2012 (E) 5 1 Scope This European Standard specifies the laboratory method for measuring the airborne sound insulation of noise barriers. It covers the assessment of the intrinsic airborne sound insulation performance of noise barriers and related devices acting on airbo
33、rne sound propagation designed for railways which can reasonably be assembled inside the testing facility described in EN ISO 10140 series. All noise reducing devices different from noise barriers and related devices acting on airborne sound propagation, e.g. devices for attenuation of ground borne
34、vibration 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
35、 references, the latest edition of the referenced document (including any amendments) applies. ENV 13005, Guide to the expression of uncertainty in measurement EN 16272-3-1, Railway applications Track Noise barriers and related devices acting on airborne sound propagation Test method for determining
36、 the acoustic performance Part 3-1: Normalised railway noise spectrum and single number ratings for diffuse field applications EN ISO 10140 (all parts), Acoustics Laboratory measurement of sound insulation of building elements 3 Terms and definitions For the purpose of this document the following te
37、rms and definitions apply. 3.1 noise barrier noise reducing device, which obstructs the direct transmission of airborne sound emanating from railways; it may either span or overhang the railway Note 1 to entry: Noise barriers are generally made of acoustic and structural elements (see 3.2 and 3.3).
38、3.2 acoustic element element whose primary function is to provide the acoustic performance of the device 3.3 structural element element whose primary function is to support or hold in place acoustic elements 4 Symbols and abbreviations For the purposes of this document, the following symbols and abb
39、reviations apply. BS EN 16272-2:2012EN 16272-2:2012 (E) 6 Table 1 Symbols and abbreviations Symbol or abbreviation Designation Unit L Greatest distance between the side edge of the sample and the post included in the sample m RiSound reduction index in the i-th one-third octave band according to EN
40、ISO 10140 series dB 5 Test arrangement The test arrangement shall be as described in EN ISO 10140 series for partitions, with the following modifications: a) The test specimen shall be mounted in the test opening and assembled in the same manner as the manufactured device is used in practice, with t
41、he same connections and seals between the component parts. The edge supports shall not overlap the sample by more than 70 mm and shall be sealed to prevent the leakage of sound. b) Where posts are employed in construction, at least one post shall be included in the specimen with panels attached on b
42、oth sides. The length of the panels on one side of the post shall be L 2 m (see Figure 1 and Figure 2). The side that would face the rail shall face the source room. c) The sample under test, excluding the plinth for levelling, shall have a windowed area not less than 9,5 m2. d) The sample surface a
43、rea to be used in calculations shall be the total surface area of the sample excluding the plinth for levelling and the overlap surface of the edge supports. BS EN 16272-2:2012EN 16272-2:2012 (E) 7 Key 1 sealing materials 2 panels 3 post 4 bricked up plinth for levelling (if necessary) Figure 1 Illu
44、stration of sample arrangement for devices having visible posts Top: front view (left) and side view (right); Middle: top view: Bottom: detail of zone A 3 BS EN 16272-2:2012EN 16272-2:2012 (E) 8 Key 1 sealing materials 2 panels 3 post 4 bricked up plinth for levelling (if necessary) Figure 2 Illustr
45、ation of sample arrangement for devices having no visible posts Top: front view (left) and side view (right); Middle: top view; Bottom: detail of zone A 6 Test procedure and evaluation The sound reduction indices Riin each one-third octave band in the range 100 Hz to 5 kHz shall be determined using
46、the method described in the EN ISO 10140 series. 7 Measurement uncertainty The uncertainty of results obtained from measurements according to this European Standard shall be evaluated, preferably in compliance with ENV 13005, using the method described in the EN ISO 10140 series. If reported, the ex
47、panded uncertainty together with the corresponding coverage factor for a stated coverage 3 BS EN 16272-2:2012EN 16272-2:2012 (E) 9 probability of 95 % as defined in ENV 13005 shall be given. More information on measurement uncertainty is given in Annex A. 8 Test report 8.1 Expression of results The
48、one-third octave band values of the sound reduction index Rishall be given at all frequencies of measurement in tabular form and in the form of a graph. The values shall be rounded to the nearest first decimal place. The measurement uncertainty of the sound reduction index Rishall be given at all fr
49、equencies of measurement. If a single-number rating of airborne sound insulation is to be calculated, then this shall be done in accordance with EN 16272-3-1. 8.2 Further information The test report shall contain: a) reference to this European Standard; b) description of test conditions, procedures and equipment used in accordance with the EN ISO 10140 series; c) full description of the test specimen including manufacturers name and product identifier with
