1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1793-3 : 1998 The E
2、uropean Standard EN 1793-3 : 1997 has the status of a British Standard ICS 17.140.30; 93.080.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Road traffic noise reducing devices Test method for determining the acoustic performance Part 3. Normalized traffic noise spectrumThi
3、s British Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 February 1998 BSI 1998 ISBN 0 580 29072 7 BS EN 1793-3 : 1998 Amendments issued since publication
4、Amd. No. Date Text affected National foreword This British Standard is the English language version of EN 1793-3 : 1997. The UK participation in its preparation was entrusted by Technical Committee B/509, Road equipment, to Subcommittee B/509/6, Fences for the attenuation of noise, which has the res
5、ponsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organ
6、izations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Stand
7、ards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2
8、to 4, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for
9、 CEN national Members. Ref. No. EN 1793-3 : 1997 E EUROPEAN STANDARD EN 1793-3 NORME EUROPE ENNE EUROPA ISCHE NORM September 1997 ICS 17.140.30; 93.080.30 Descriptors: Environmental protection, acoustics, noise: sound, roads, traffic lanes, acoustic shields, acoustic tests, laboratory tests, acousti
10、c measurements, noise reduction, estimation, spectra English version Road traffic noise reducing devices Test method for determining the acoustic performance Part 3: Normalized traffic noise spectrum Dispositifs de re duction du bruit du trafic routier Me thode dessai pour la de termination de la pe
11、rformance acoustique Partie 3: Spectre sonore normalise de la circulation La rmschutzeinrichtungen an Straen Pru fverfahren zur Bestimmung der akustischen Eigenschaften Teil 3: Standardisiertes Verkehrsla rmspektrum This European Standard was approved by CEN on 1997-08-23. CEN members are bound to c
12、omply 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 bibliographical references concerning such national standards may be obtained on application to the Central
13、Secretariat 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 responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the
14、official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1793-3 : 1997 BSI 1998 Foreword
15、 This European Standard has been prepared by Technical Committee CEN/TC 226, Road equipment, the secretariat of which is held by AFNOR. This European Standard consists of the following Parts under the general title: Road traffic noise reducing devices Test method for determining the acoustic perform
16、ance: Part 1: Intrinsic characteristics of sound absorption; Part 2: Intrinsic characteristics of airborne sound insulation; Part 3: Normalized traffic noise spectrum. The following Parts have not yet been prepared, but research is being carried out within the European Research Programme, Testing an
17、d Measurement: Part 4: Extrinsic characteristics of in situ efficiency; Part 5: Intrinsic characteristics of in situ values of sound absorption and airborne sound insulation. This European Standard shall be given the status of a national standard, either by publication of an identical text or by end
18、orsement, at the latest by March 1998, and conflicting national standards shall be withdrawn at the latest by March 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium
19、, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Definitions 3 3 Normalized traffic noise spectrum 3Page 3 EN 1793-3
20、: 1997 BSI 1998 Introduction As the main acoustic properties of road traffic noise reducing devices, transmission loss and absorption, are frequency-dependent, there is a need to define a traffic noise spectrum for test purposes. This standard defines the basic properties of traffic noise measured a
21、t the roadside in terms of a characteristic normalized 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 an
22、d assessment of the acoustic performance of devices designed to reduce traffic noise near roads. 2 Definitions 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 noi
23、se reducing devices near roads, in terms of single-number ratings of sound absorption and airborne sound insulation. The spectrum is expressed in relative A-weighted sound pressure levels, in decibels, for one-third octave bands, L i , in the frequency range from 100 Hz to 5 kHz. 2.2 one-third octav
24、e band level L i Relative A-weighted sound pressure levels, in decibels, of the normalized traffic noise spectrum for one-third octave bands with centre frequency f i . 3 Normalized traffic noise spectrum The normalized traffic noise spectrum shown in table 1 shall be used to assess the acoustic per
25、formance of traffic noise reducing devices. Table 1. Normalized traffic noise spectrum f i L i Hz dB 100 220 125 220 160 218 200 216 250 215 315 214 400 213 500 212 630 211 800 29 1000 28 1250 29 1600 210 2000 211 2500 213 3150 215 4000 216 5000 218BSI 389 Chiswick High Road London W4 4AL | | | | |
26、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent
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