1、BRITISH STANDARDBS EN 352-4:2001IncorporatingAmendment No. 1Hearing protectors Safety requirements and testing Part 4: Level-dependent ear-muffsThe European Standard EN 352-4:2001, with the incorporation of amendment A1:2005, has the status of a British StandardICS 13.340.20g49g50g3g38g50g51g60g44g4
2、9g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 352-4:2001This British Standard, having been prepared under the direction of the Health and Environment Sector Committe
3、e, was published under the authority of the Standards Committee and comes into effect on 15 May 2001 BSI 14 March 2006ISBN 0 580 37593 5National forewordThis British Standard is the official English language version of EN 352-4:2001, including amendment A1:2005.The start and finish of text introduce
4、d or altered by CEN 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 A is indicated by .The UK participation in its preparation was entrusted to Technical Committee PH/7, Hearing protect
5、ors, which has the responsibility 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 t
6、he UK.A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards
7、Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.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 does
8、not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 14, an inside back cover and a back cover.The BSI copyright date displayed in this document indicates when the document was last issued.Ame
9、ndments issued since publicationAmd. No. Date Comments16102 March 2006 See national forewordEN 352-4 March 2001 + A1 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM October 2005 ICS 13.340.20English version Hearing protectors - Safety requirements and testing - Part 4: Level-dependent ear-muffs (i
10、ncludes amendment A1:2005) Protecteurs individuels contre le bruit - Exigences de scurit et essais - Partie 4: Serre-tte attnuation dpendante du niveau (inclut lamendement A1:2005) Gehrschtzer - Sicherheitstechnische Anforderungen und Prfungen - Teil 4: Pegelabhngige Kapselgehrschtze (enthlt nderung
11、 A1:2005) This European Standard was approved by CEN on 18 January 2001. Amendment A1 was approved by CEN on 19 September 2005. 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
12、without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application 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
13、 made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland,
14、Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CEN All rights of exploitation in
15、 any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 352-4:2001+ A1:2005 EPage 2 EN 352-4:2001 ContentsPageForeword 3 Foreword to amendment A1 3Introduction 4 1 Scope 42 Normative references 53 Terms and definitions 54 Requirements 65 Testing 66 Information supplied by
16、 the manufacturer 77 Marking 8Annex A 9(normative) Test results, uncertainty of measurement 9Annex B 10(informative) Determination of criterion level and spread out sound transmission for level-dependent ear-muffs 10Annex ZA (informative) Clauses of this European Standard addressing essential requir
17、ements or other provisions of EU Directives 13Bibliography 14 Page 3 EN 352-4:2001 Foreword This European Standard has been prepared by Technical Committee CEN/TC 159 “Hearing protectors“, the secretariat of which is held by SIS. This European Standard shall be given the status of a national standar
18、d, either by publication of an identical text or by endorsement, at the latest by September 2001, and conflicting national standards shall be withdrawn at the latest by September 2001. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European F
19、ree Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countri
20、es are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A1 This European Standard (EN 35
21、2-4:2001/A1:2005) has been prepared by Technical Committee CEN/TC 159 “Hearing protectors“, the secretariat of which is held by SIS. This Amendment to the European Standard EN 352-4:2001 shall be given the status of a national standard, either by publication of an identical text or by endorsement, a
22、t the latest by April 2006, and conflicting national standards shall be withdrawn at the latest by April 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, C
23、zech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Page 4EN 352-4:2001IntroductionLevel-dependent ear-muff
24、s are designed to provide restoration of external sounds, whileproviding attenuation of sounds at high levels. They may be selected for use in intermittent orimpulsive noise environments and where external warning sounds are required to be heard. ThisStandard is concerned with those ear-muffs having
25、 an electronic sound restoration circuit.This part of the Standard is a specification intended for type approval purposes, for which foursets of specimen ear-muffs are tested.The requirements and tests of the standard are concerned primarily with the level-dependentperformance of the ear-muffs.This
26、Standard for “Hearing Protectors - Safety Requirements and Testing: Level-dependentear-muffs“, sets requirements for personal hearing protection devices in relation toDirective 89/686/EEC - Personal Protective Equipment.EN 352-1:1993 deals with requirements and test methods for ear-muffs, EN 352-2:1
27、993 withear-plugs, EN 352-3:1996: with ear-muffs for attachment to safety helmets. Additional safetyrequirements and the associated test procedures for ear-muffs with active noise reduction arecontained in prEN 352-5:2000, for ear-muffs with audio communications in prEN 352-6:2000and for level-depen
28、dent ear-plugs in prEN 352-7:2000. An associated standard EN 458, coversselection, use, care and maintenance of hearing protection. The particular requirement for hearing protectors in relation to their ability to reduce noise tobelow daily limit levels set by Directive 86/188/EEC - “on the protecti
29、on of workers from therisks related to exposure to noise at work“ is addressed in the standard by means of arequirement to report in which noise environments the hearing protector may be used withoutexceeding the relevant action level set by that Directive.An additional acoustic performance test met
30、hod to that described in EN 24869-1 and applied inEN 352-1:1993, EN 352-2:1993 and EN 352-3:1996 is required for level-dependent ear-muffs. Methods of measurement are under consideration by CEN/TC 211. Until such time as thiswork is completed the test method described in annex B of this standard is
31、recommended forlevel-dependent ear-muffs in addition to the EN 24869-1 test.1ScopeThis European Standard is applicable to level-dependent ear-muffs. It specifies additionalconstructional, design and performance requirements, methods of test, marking requirementsand user information relating to the i
32、ncorporation of the level-dependency facility.Page 5 EN 352-4:2001 2 Normative references This 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 listed
33、hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to apply (including amendments). EN 352-1 :
34、 1993 Hearing protectors - General requirements - Part 1 : Ear-muffs 3 Terms and definitions For the purposes of this European Standard the terms and definitions given in EN 352-1:1993 and the following definitions apply. 3.1criterion level (H)A-weighted sound pressure level of the H noise for which
35、 the A-weighted equivalent diffuse field related sound pressure level when a level-dependent ear-muff is worn and the sound restoration circuit is operating at maximum volume first exceeds 85 dB(A) (as determined using the calculation procedure described in Annex B) 3.2criterion level (M) A-weighted
36、 sound pressure level of the M noise for which the A-weighted equivalent diffuse field related sound pressure level when a level-dependent ear-muff is worn and the sound restoration circuit is operating at maximum volume first exceeds 85 dB(A) (as determined using the calculation procedure described
37、 in Annex B) 3.3criterion level (L) A-weighted sound pressure level of the L noise for which the A-weighted equivalent diffuse field related sound pressure level when a level-dependent ear-muff is worn and the sound restoration circuit is operating at maximum volume first exceeds 85 dB(A) (as determ
38、ined using the calculation procedure described in Annex B) 3.4level-dependent ear-muff an ear-muff fitted with an electronic sound restoration circuit 3.5sound restoration circuit an electroacoustic device intended to reproduce lower level external sounds in the ear canal, while usually providing at
39、tenuation of higher level sounds by means of a level-dependent gain functionPage 6 EN 352-4:2001 4 Requirements Level-dependent ear-muffs shall meet the requirements of EN 352-1:1993. Additional requirements are listed below. 4.1 SizingThere are no additional requirements for level-dependent ear-muf
40、fs beyond those referenced in EN 352-1:1993. 4.2 Materials and constructionNo component of the ear-muff shall constitute an electrical safety hazard to the user. 4.3 Performance 4.3.1 General Level-dependent ear-muffs shall meet all the performance requirements of EN 352-1:1993, including the minimu
41、m attenuation requirement in their passive mode. Additionally, the requirements specified below shall be satisfied. Specimens of ear-muffs shall be conditioned and tested as specified in 5.1.1 and 5.1.2. The scheme of testing shall be as specified in 5.1.3. 4.3.2 Criterion levelsThe criterion levels
42、 for the three noises H, M and L determined in accordance with 5.2 shall be reported in wearer information. Text deleted 5 Testing This scheme of testing is additional to that described in EN 352-1:1993. It shall be carried out on additional samples. 5.1 Specimens, conditioning and scheme of testing
43、5.1.1 Specimens Four pairs of ear-muffs shall be submitted for testing. The individual ear-muff cups shall be numbered 1 to 8 (or in the case that level-dependent facilities are not fitted to both cups of the ear-muffs, 1 to 4). Fresh batteries, if any are installed in the ear-muffs, shall be fitted
44、 for the tests.Page 7 EN 352-4:2001 5.1.2 Conditioning and testing atmosphere All specimens shall be conditioned and tested in an atmosphere having a temperature of 22oC r 5 oC and a relative humidity of not more than 85%, as required in EN 352-1:1993. 5.1.3 Scheme of testing The eight ear-muff cups
45、 (or four if level-dependent facilities are not fitted to both cups) shall be tested for criterion levels as described in 5.2. The spread of sound transmission shall be calculated as described in 5.3. 5.2 Criterion levels The acoustic measurements for level dependent ear-muffs are under consideratio
46、n. For the time being and because of the urgent need, such measurements may be carried out in accordance with test procedures described in annex B. Text deleted 6 Information supplied by the manufacturer Information according with 6.1 and 6.2 shall be provided at least in the official language(s) of
47、 the European state of destination. 6.1 Wearer informationThe following information for the wearer (in addition to that required by EN 352-1:1993) shall be supplied with the ear-muffs: a) the number of this standard, EN 352-4; b) an indication as to whether the hearing protector provides a level-dep
48、endent facility; c) the values of the criterion levels as determined by the procedures described in annex B; d) recommended storage conditions before and after use; e) method of checking, charging and changing batteries; f) for ear-muffs with a level-dependent facility, the statements: i) “This ear-
49、muff is provided with level-dependent attenuation. The wearer should check correct operation before use. If distortion or failure is detected, the wearer should refer to thePage 8EN 352-4:2001manufacturers advice for maintenance and replacement of thebattery.“ii) “Warning - performance may deteriorate with battery usage. Thetypical period of continuous use that can be expected from theear-muff battery is hours (to be inserted by themanufacturer).“ iii) “Warning - The output of the level-dependent circuit of thishearing protector may exceed
