1、STD-BSI BS EN 1793-3-ENGL 1798 H lb24bb7 b81507 577 = BS EN BRITISH STANDARD 1793-3 : 1998 Road traffic noise reducing devices - Test method for determining the acoustic performance Part 3. Normalized traffic noise spectrum The European Stanard EN 1793-3 : 1997 has the status of a British Standard I
2、Cs 17.140.30; 93.080.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGKT LAW STD-BSI BS EN 1793-3-ENGL 1998 = 1b24bb Obl1508 403 m BS EN 17933 : 1998 National fore word This British Standard is the English language version of EN 1793-3 : 1997. The UK participation in its preparaton
3、 was entnisted by Technical Committee BBo9, Road equipment, to Subcommittee B/509/6, Fences for the attenuation of noise, which has the responsibility to: - aid enquirem to unde-d the text; - present to the responsible European committee any enquiries on the interpretation, or proposals for change,
4、and keep the UK interests informed; - monitor relateci international and European developments and promulgate them in the UK. A list of organizations represented on this subcoxnmittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or
5、 European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled Intemational Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confe
6、r immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover. This British Standard, having been prepared under the direction of the Sector Board for Building and Civil Enginee
7、ring, was published under the authority of the Standards Board and comes into effect on 16 February 1998 Amendments issued since publication ID* Ama No. O BSI 1998 ISBN O 68 29072 7 STD-BSI BS EN 1793-3-ENGL 1778 m 1624bb7 Ob81509 3LiT EUROPEAN STANDARD NOFUME EUR0PEE”E EuRopAIscHE NORM EN 1793-3 Se
8、ptember 1997 ICs 17.140.30 93.080.30 Descriptors: Environmental protection, acoustics, noise: sound, roads, traffic lanes, acoustic shields, acoustic tests, laboratory tests, acoustic measurements, noise reduction, estimation, spectra English version Road tmc noise reducing devices - Test method for
9、 detemiining the acoustic pertomce - Part 3: Normalized traffic noise spectmm Dispositifs de duction du bruit du trafic routier - Mthode dessai pour ia dtermination de ia performance acoustique - Eigenschaften - Partie 3 Spectre sonore normalis de la circdaion Lrrnschutz4nrichtungen an StraBen - Prf
10、verfahren zur Eksimmung der akustischen Teil 3 Standardisiertes Verkehislarmspektsum This European Standard was approved by CEN on 1997-08-23. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a nat
11、ional standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in a
12、ny other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Amtria, Belgium, Czech Republic, Denmark, Finland, France, Germa
13、ny, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fur Normung Central Secretariat: rue de Stassart 36, B-1060 Brussels O 1997 CEN - A
14、li rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 17933 : 1997 E STD.BSI BS EN 1773-3-ENGL 1778 W Lb24bb7 Ob1510 Ob1 H Page 2 EN 17933 : 1997 Foreword Contents This European Standard has been prepared by ilxhnica Committee CENAC 226, Road
15、 equipment, Foreword the secretariat of which is held by AFNOR. This European Standard consists of the following Parts Introduction under the general title: 1 Scope 2 Definitions Road tmffic noise reducing daices - Test method for determining the acoustic per$ormume: 3 Normalized traffic noise spe-
16、- Part 1: Intrinsic characteristics of sound absorption; - Part 2: Intrinsic chamteristics of airborne sound insulation; - Part 3: Normalized tmflTc noise spectrum. The foliowing Parts have not yet been prepared, but research is being carried out within the European Research Programme, %sting and Me
17、asurement: - Part 4: Extrinsic chracteristTcs of in situ - Part 5: Intrinsic characteristics of in situ values of sound absorption and airborne sound insulatwn. er-; This European Standard shall be given the status of a nationai standard, either by publication of an identical text or by endorsement,
18、 at the latest by March 1998, and conflictllig national standards shail be withdrawn at the latest by March 1998. According to the CENKENELEC Internai Regulations, the national standards organktions of the following countries are bound to implement this European Stan- Austria, Belgium, Czech Republi
19、c, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, I*, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. page 2 3 3 3 3 O BSI 1998 STD-BSI BS EN 1793-3-ENGL 1998 D 1b2LibbS Ob82521 TTB Page 3 EN 17933 : 1997 Introduction As the main acoustic p
20、roperties of road traffic noise reducing devices, tmnsmission loss and absorption, are frequencydependent, there is a need to define a trafc noise spectrum for test purposes. This standard defines the basic properties of traffic noise measured at the roadside in terms of a characteristic normalized
21、traffic noise spectrum, which is needed to evaluate single-number ratings of noise reducing devices, except those used in reverberant conditions, e.g. tunnels. 1 scope This standard gives a normalized traffic noise spectrum for the evaluation and assessment of the acoustic performance of devices des
22、igned to reduce traffic noise near roads. 2 Dennitions For the purposes of this standard the following definitions apply. 2.1 normalized traffic noise spectrum Spectrum that is used for the calculation of the acoustic performance of traffic noise reducing devices near roads, in terms of singlenumber
23、 ratings of sound absorption and airborne sound insulation. The spectsum is expressed in relative A-weighted sound pressure levels, in decibels, for onethird octave bands, Li, in the frequency range from 100 Hz to 5 kHz. 2.2 one-third octave band level Li Relative A-weighted sound pressure levels, i
24、n decibels, of the normalized traffic noise spectrum for one-third octave bands with centre frequencyfi. 3 Normalized traffic noise spectrum The normalized tmfc noise spectrum shown in table 1 shall be used to assess the acoustic performance of traffic noise reducing devices. ihble 1. Normalized tra
25、ffic noise spectrum i 12 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 Li E3 -20 -20 - 18 - 16 - 15 - 14 - 13 - 12 - 11 -9 -8 -9 - 10 -11 - 13 - 15 - 16 - 18 O BSI 1998 BS EN 1793-3 : 1998 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution
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