1、BRITISH STANDARDBS EN 352-5:2002Incorporating Amendment No. 1Hearing protectors Safety requirements and testing Part 5: Active noise reduction ear-muffsThe European Standard EN 352-5:2002, incorporating amendment A1:2005, has the status of a British StandardICS 13.340.20g49g50g3g38g50g51g60g44g49g42
2、g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 352-5:2002This British Standard, having been prepared under the direction of the Health and Environment Sector Policy and S
3、trategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 23 December 2002 BSI 2006ISBN 0 580 41018 8National forewordThis British Standard was published by BSI. It is the UK implementation of EN 352-5:2002i.The start and finish of text introduced or alte
4、red by amendment is indicated in the text by tags !“. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1:200X is indicated by !“.The UK participation in its preparation was entrusted to Technical Committee PH/7, Hearing protectors
5、.A list of organizations represented on PH/7 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.Compliance with a British Standard cannot confer immunity from legal obl
6、igations.Amendments issued since publicationAmd. No. Date Comments16152 29 September 2006 See national forewordEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 352-5December 2002ICS 13.340.20English versionHearing protectors - Safety requirements and testing - Part 5:Active noise reduction ear-muff
7、sProtecteurs individuels contre le bruit - Exigences descurit et essais - Partie 5: Serre-tte attnuation activedu bruitGehrschtzer - Sicherheitstechnische Anforderungen undPrfungen - Teil 5: Kapselgehrschtzer mit aktiverGeruschkompensationThis European Standard was approved by CEN on 16 October 2002
8、.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on ap
9、plication to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the
10、same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE
11、 FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2002 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 352-5:2002 E+ A1December 20052ContentspageFor
12、eword3Introduction.41 Scope42 Normative references43 Terms and definitions .54 Requirements.55 Testing66 Information supplied by the manufacturer .77 Marking.8Annex A (informative) Uncertainty of measurement and interpretation of test results9Annex B (informative) Determination of active attenuation
13、 and spread of active attenuationfor active noise reduction ear-muffs.12Annex ZA (informative) Clauses of this European standard addressing essentialrequirements or other provisions of EU Directive 14Bibliography15EN 352-5:20023ForewordThis document (EN 352-5:2002) has been prepared by Technical Com
14、mittee CEN/TC 159, “Hearingprotectors“, the secretariat of which is held by SIS.This European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by June 2003, and conflicting national standards shall be withdrawn atth
15、e latest by June 2003.This document has been prepared under a mandate given to CEN by the European Commission and theEuropean Free Trade Association, and supports essential requirements of EU Directive(s).For relationship with EU Directives, see informative Annex ZA, which is an integral part of thi
16、s standard.In this standard the annexes A and B are informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,Finland, France, Germany, Greece,
17、 Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway,Portugal, Spain, Sweden, Switzerland and the United Kingdom.Foreword to amendment A1This European Standard (EN 352-5:2002/A1:2005) has been prepared by Technical Committee CEN/TC 159 “Hearing protectors”, the secretariat of which is he
18、ld by SIS. This Amendment to the European Standard EN 352-2:2002 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2006, and conflicting national standards shall be withdrawn at the latest by June 2006. According to
19、the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxe
20、mbourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 352-5:20024IntroductionThis standard for ”Hearing Protectors Safety requirements and testing Part 5: Active noise reduction ear-muffs”, specifies procedures for the testing of
21、personal hearing protection devices in relation to Directive89/686/EEC - Personal Protective Equipment.EN 352-1 deals with requirements for ear-muffs, EN 352-2 with ear-plugs, EN 352-3 with ear-muffs attachedto industrial safety helmets. EN 13819-1 and EN 13819-2 deal with testing plans common to al
22、l types ofhearing protectors covered by this series of ENs.Additional safety requirements and the associated test procedures for level-dependent ear-muffs arecontained in EN 352-4, for ear-muffs with electrical audio input in prEN 352-6 and for level-dependent ear-plugs in prEN 352-7. An associated
23、standard EN 458, covers selection, use, care and maintenance ofhearing protection.The particular requirement for hearing protectors in relation to their ability to reduce noise to below daily limitlevels set by Directive 86/188/EEC - “on the protection of workers from the risks related to exposure t
24、o noise atwork“ is addressed in the standard by means of a requirement to report the active component of attenuationprovided by the ear-muffs, to complement the passive attenuation data reported within EN 352-1.An additional acoustic performance test method to that described in EN 24869-1 and applie
25、d in EN 352-1, EN352-2 and EN 352-3 is required for active noise reduction ear-muffs. Until such time as this work is completed thetest method described in Annex B of this standard is recommended for active noise reduction ear-muffs inaddition to the EN 24869-1 test.Active noise reduction ear-muffs
26、are designed to provide additional attenuation of external sounds by means of anoise cancellation circuit. This additional attenuation is usually provided at low and mid frequencies. They may beselected for use in low frequency dominated high noise environments.This part of the standard is a specifi
27、cation intended for type approval purposes, for which four sets of specimenear-muffs are tested (further samples may be required for testing under EN 352-1, or EN 352-3, as appropriate).The requirements and tests of the standard are concerned primarily with the active noise reduction performanceof t
28、he ear-muffs. The standard may be applied to ear-muffs for fitting to industrial safety helmets.1 ScopeThis European Standard is concerned with active noise reduction (ANR) ear-muffs. It specifies additionalconstructional, design and performance requirements, methods of test, marking requirements an
29、d userinformation relating to the incorporation of the active noise reduction facility.The requirements of this standard are intended to take account of the ergonomic interaction between thewearer, the device and, where possible, the working environment in which the device is likely to be used (seeA
30、nnex ZA of this standard and EN 458)2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications.These normative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, s
31、ubsequent amendments to or revisions of any of these publications apply tothis European Standard only when incorporated in it by amendment or revision. For undated references thelatest edition of the publication referred to applies (including amendments).EN 352-1:2002, Hearing protectors - General r
32、equirements - Part 1: Ear-muffsEN 352-5:20025EN 352-3:2002, Hearing protectors General requirements Part 3: Ear-muffs attached to an industrialsafety helmetEN 13819-1, Hearing protectors - Testing - Part 1: Physical test methods3 Terms and definitionsFor the purposes of this European Standard the fo
33、llowing additional terms and definitions to those of EN 352-1:2002 (or EN 352-3:2002, as appropriate) apply:3.1 active modeoperation of the ANR ear-muff with the ANR circuit switched on.3.2 passive modeoperation of the ANR ear-muff with the ANR circuit switched off.4 Requirements4.1 GeneralActive no
34、ise reduction ear-muffs shall meet the requirements of EN 352-1 (or EN 352-3, as appropriate).Additional requirements are listed below.4.2 Materials and constructionThe electronic circuit of the ANR ear-muff shall meet the electrical safety and EMC requirements appropriate tothis class of equipment.
35、4.3 Performance4.3.1 GeneralActive noise reduction ear-muffs shall meet all the performance requirements of EN 352-1(or EN 352-3, asappropriate), including the minimum attenuation requirement in their passive mode. Additionally, therequirements specified in 4.3.2, 43.3 and 4.3.4 shall be satisfied.S
36、pecimens of ear-muffs shall be conditioned and tested as specified in 5.1.1 and 5.1.2. The scheme of testingshall be as specified in 5.1.3.4.3.2 Active attenuationThe sound output levels of the four test samples shall be measured in accordance with 5.2 and reported in wearerinformation (6.1).EN 352-
37、5:200264.3.3 Maximum Sound Pressure Level for linear operationThe highest level of the external test noise for which the sound pressure level at the subjects ear remains linearlyrelated to the external sound pressure level, for all subjects and samples tested, up to a maximum external soundpressure
38、level of 110 dB, shall be determined in accordance with 5.3 and reported in wearer information (6.1).4.3.4 Oscillation and acoustic malfunctionWhen tested in accordance with 4.3.2, none of the subjects shall have perceived sustained oscillation oracoustic malfunction (whistling or instability) when
39、the ear-muff has been fitted in accordance with themanufacturers instructions.5 Testing5.1 Specimens, conditioning and scheme of testingThis scheme of testing is additional to that described in EN 13819-1. It shall be carried out on additionalsamples. Estimates of uncertainty shall be presented with
40、 results, according to Annex A.5.1.1 SpecimensFour pairs of ear-muffs shall be submitted for testing. The individual ear-muff cups shall be numbered 1 to 8.Fresh batteries, if any are installed in the ear-muffs, shall be fitted for the tests.5.1.2 Conditioning and testing atmosphereAll specimens sha
41、ll be conditioned and tested in an atmosphere having a temperature of 22 oC 5 oC and arelative humidity of not more than 85 %, as required in EN 13819-1.5.1.3 Scheme of testingThe eight ear-muff cups shall be tested for active attenuation as described in 5.2 and for linearity as describedin 5.35.2 A
42、ctive attenuationThe acoustic measurements for active noise reduction ear-muffs are under consideration. For the time beingand because of the urgent need, such measurements may be carried out in accordance with test proceduresdescribed in Annex B.5.3 Maximum Sound Pressure Level for linear operation
43、The acoustic measurements for active noise reduction ear-muffs are under consideration. For the time being andbecause of the urgent need, such measurements may be carried out in accordance with test proceduresdescribed in Annex B.“!EN 352-5:200276 Information supplied by the manufacturer6.1 Wearer i
44、nformationThe following information for the wearer (in addition to that required by EN 352-1 or EN 352-3 as appropriate) shall be supplied with the ear-muffs:a) the number of this standard, EN 352-5;b) an indication as to whether the hearing protector provides an active noise reduction facility;c) t
45、he values of the active attenuation as determined by the procedures described in the Annex B;d) recommended storage conditions before and after use;e) maintaining of batteries;f) for ear-muffs with an active noise reduction facility, the statements:1) “This ear-muff is provided with active noise red
46、uction. The wearer should check correct operationbefore use. If distortion or failure is detected, the wearer should refer to the manufacturers advice formaintenance and replacement of the battery.”2) “Warning: performance may deteriorate with battery usage. The typical period of continuous use that
47、can be expected from the ear-muff battery is . hours” (to be inserted by the manufacturer).3) “Warning: the performance of the active noise reduction may be adversely affected when sustainedoscillation (whistling or instability) is perceived. If refitting the ear-muff or replacement of the batteries
48、, iffitted, does not overcome this malfunction, the wearer should contact the supplier or manufacturer.”g) the address from which additional information can be obtained.Information according with 6.1 shall be provided at least in the official language(s) of the European state ofdestination.6.2 Addit
49、ional informationThe following information shall be available from the manufacturer on request:a) results of tests performed in accordance with this European Standard;b) the name and country of the test laboratory which performed the tests specified and the date of the tests.Information according with 6.2 shall be provided at least in the official language(s) of the European state ofdestination.!“EN 352-5:200287 MarkingThe requirements for marking given in EN 352-1 shall be used. The generic mark “EN 352” as specified in EN352-1 is used, since a product may
