1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 13.340.20 ISBN 0-626-17319-1 SANS 50352-6:2005Edition 1EN 352-6:2002Edition 1SOUTH AFRICAN NATIONAL STANDARD Hearing protectors Safety requirements a
4、nd testing Part 6: Ear-muffs with electrical audio input This national standard is the identical implementation of EN 352-6:2002 and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria
5、0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 50352-6:2005 Edition 1 EN 352-6:2002 Edition 1 Table of changes Change No. Date Scope Abstract Specifies constructional, design and performance requirements, methods of test, marking requ
6、irements and user information relating to the incorporation of an electrical audio input facility of ear-muffs. Keywords ear-muffs, ear protectors, occupational safety, protective equipment, protectors. National foreword This South African standard was approved by National Committee StanSA TC 76, Ac
7、oustics, electro-acoustics and vibration, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. Note that in annex A no mention is made of the confidence level to be used when applying the uncertainty of measurement. It is proposed that K=2 or
8、a 95 % confidence level is used. EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 352-6December 2002ICS 13.340.20English versionHearing protectors - Safety requirements and testing - Part 6:Ear-muffs with electrical audio inputProtecteurs individuels contre le bruit - Exigences descurit et essais -
9、 Partie 6: Serre-tte avec entre audio-lectriqueGehrschtzer - Sicherheitstechnische Anforderungen undPrfungen - Teil 6: Kapselgehrschtzer mitKommunikationseinrichtungenThis European Standard was approved by CEN on 16 October 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulatio
10、ns 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 application to the Management Centre or to any CEN member.This European St
11、andard 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 same status as the officialversions.CEN members are the national standar
12、ds 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 FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR
13、 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 352-6:2002 EEN 352-6:2002 (E)2ContentspageForeword3Introduction.41 Scope42 Normative references43 Terms and definitio
14、ns .54 Requirements.55 Testing56 Information supplied by the manufacturer .67 Marking.7Annex A (informative) Uncertainty of measurement and interpretation of test results8Annex B (informative) Determination of sound output levels for ear-muffs fitted withelectrical audio input10Annex ZA (informative
15、) Clauses of this European standard addressing essentialrequirements or other provisions of EU Directive 11Bibliography12EN 352-6:2002 (E)3ForewordThis document (EN 352-6:2002) has been prepared by Technical Committee CEN/TC 159, “Hearingprotectors“, the secretariat of which is held by SIS.This Euro
16、pean 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 atthe latest by June 2003.This document has been prepared under a mandate given to CEN by the
17、 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 this standard.In this standard the annexes A and B are informative.According to the CEN/CENE
18、LEC 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, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway,Portugal, Spain, Sweden,
19、 Switzerland and the United Kingdom.EN 352-6:2002 (E)4IntroductionThis standard for ”Hearing Protectors safety requirements and testing Part 6: Ear-muffs with electricalaudio input”, specifies procedures for the testing of personal hearing protection devices in relation to Directive89/686/EEC - Pers
20、onal 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 all types ofhearing protectors covered by this series of ENs.Additional safety
21、requirements and the associated test procedures for level-dependent ear-muffs arecontained in EN 352-4, for ear-muffs with active noise reduction in EN 352-5 and for level-dependent ear-plugs in EN 352-7. An associated standard EN 458, covers selection, use, care and maintenance of hearingprotection
22、.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 to noise atwork“ is addressed in the standard by means of a requirement to report
23、the output sound levels of the electricalaudio circuit.An additional acoustic performance test method to that described in EN 24869-1 and applied in EN 352-1,EN 352-2 and EN 352-3 is required for ear-muffs with electrical audio input. Until such time as this work iscompleted, the test method describ
24、ed in Annex B of this standard is recommended for ear-muffs with electricalaudio input, in addition to the EN 24869-1 test required within EN 352-1.Ear-muffs with electrical audio input are designed to provide speech information and warning signals, whileproviding attenuation of sounds in excess of
25、limit levels. They may be selected for use in a number of differentworking environments, in air traffic communication, in the police forces, in the broadcasting and entertainmentindustries, in intermittent or impulsive noise environments when speech information needs to be received andwhere other wa
26、rning signals are required to be heard.This part of the standard is a specification intended for type approval purposes, for which four sets of specimenear-muffs are tested, (further samples may be required for testing under EN 351, or EN 352-3, as appropriate).The requirements and tests of the stan
27、dard are concerned primarily with the electrical audio input performance ofthe ear-muffs. The standard may be applied to ear-muffs for fitting to industrial safety helmets.1 ScopeThis European Standard is concerned with ear-muffs whose passive acoustic performance may be supplementedby an electrical
28、 audio input facility or circuit for essential safety-related purposes. It specifies additionalconstructional, design and performance requirements, methods of test, marking requirements and userinformation relating to the incorporation of the electrical audio input facility.The requirements of this
29、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 (seeAnnex ZA of this standard and EN 458)2 Normative referencesThis European Standard incorporates by dated or undate
30、d 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, subsequent amendments to or revisions of any of these publications apply tothis European Standard only when incor
31、porated 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 requirements - Part 1: Ear-muffsEN 352-6:2002 (E)5EN 352-3:2002, Hearing protectors General requirements Part 3:
32、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 terms and definitions given in EN 352-1:2002 (or EN 352-3:2002, as appropriate) and the following definition a
33、pply:3.1sound output levelA-weighted diffuse-field related sound pressure level produced by the electrical audio input facility of an ear-mufffor a given input level.4 Requirements4.1 GeneralEar-muffs with electrical audio input shall meet the requirements of EN 352-1 (or EN 352-3, as appropriate).A
34、dditional requirements are listed below in 4.2 to 4.4.4.2 Materials and constructionThe electrical circuit of the ear-muff shall meet the electrical safety and EMC requirements appropriate to thisclass of equipment.4.3 Performance4.3.1 GeneralEar-muffs with electrical audio input shall meet all the
35、performance requirements of EN 352-1 (or EN 352-3, asappropriate), including the minimum attenuation requirement in their passive mode. Additionally, the requirementsspecified below in 4.3 shall be satisfied.Specimens of ear-muffs shall be conditioned and tested as specified in 5.1.1 and 5.1.2. The
36、scheme of testingshall be as specified in 5.1.3.4.3.2 Sound output levelsThe sound output levels of the four test samples shall be measured in accordance with 5.2 and reported in wearerinformation (6.1).5 Testing5.1 Specimens, conditioning and scheme of testingThis scheme of testing is additional to
37、 that described in EN 13819-1. It shall be carried out on additional samples.5.1.1 SpecimensFour pairs of ear-muffs shall be submitted for testing. The individual ear-muff cups shall be numbered 1 to 8 (or inthe case that electrical audio inputs are not fitted to both cups of the ear-muffs, 1 to 4).
38、EN 352-6:2002 (E)65.1.2 Conditioning and testing atmosphereAll specimens shall 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 (or four if electrical a
39、udio inputs are not fitted to both cups) shall be tested for outputlevels as described in 5.2.5.2 Sound output levelsThe acoustic measurements of sound output levels for ear-muffs with electrical audio input are underconsideration.For the time being and because of the urgent need, such measurements
40、may be carried out in accordancewith test procedures described in Annex B.6 Information supplied by the manufacturer6.1 Wearer informationThe following information for the wearer (in addition to that required by EN 352-1) shall be supplied with theear-muffs:a) the number of this standard, EN 352-6;b
41、) an indication as to whether the hearing protector provides electrical audio input;c) the values of the sound output levels as determined by the procedures described in the Annex B;d) recommended storage conditions before and after use;e) electrical safety information relating to the audio input fa
42、cility or ear-muffs with electrical audio input, thestatements:1) ”This ear-muff is provided with electrical audio input. The wearer should check correct operation beforeuse. If distortion or failure is detected, the wearer should refer to the manufacturers advice. “2) ”Warning - The output of the e
43、lectrical audio circuit of this hearing protector may exceed the daily limitsound level.”f) 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 Additional informati
44、onThe following information shall be available from the manufacturer on request:a) results of tests performed in accordance with this standard;EN 352-6:2002 (E)7b) the name and country of the test laboratory which performed the tests specified and the date of the tests.Information according with 6.2
45、 shall be provided at least in the official language(s) of the European state ofdestination.7 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 meet EN 352-1 and EN 352-6 simultaneously.EN 352-6:2002 (E
46、)8Annex A(informative)Uncertainty of measurement and interpretation of test resultsFor each of the required measurements performed in accordance with this standard, a correspondingestimate of the uncertainty of measurement should be evaluated.This estimate of uncertainty should be applied and stated
47、 when reporting test results, in order to enable theuser of the test report to assess the reliability of the data.The following protocol with regard to uncertainty of measurement should be applied to test results:If the limit value for the particular test given in the standard falls outside of the r
48、ange of values calculated fromthe test data plus/minus the estimated uncertainty of measurement (U), then the result should be deemed tobe a straightforward pass or fail (Figures A.1 and A.2).Key1 Result of a measurement2 Upper specification limit (USL)3 Specification range4 Lower specification limi
49、t (LSL)Figure A.1 - Result passEN 352-6:2002 (E)9Key1 Result of a measurement2 Upper specification limit (USL)3 Specification range4 Lower specification limit (LSL)Figure A.2 Result failIf the limit value for the particular test given in the standard falls within the range of values calculated from thetest data plus/minus the estimated uncertainty of measurement U), then the assessment of pass or fail shouldbe determined on the basis of safety, that is, considering the safest conditions for the user of the PPE (FigureA.3).Key1 Result of a measurement2 Upper s
