BS EN ISO 4869-4-2000 Acoustics Hearing protectors Measurement of effective sound pressure levels for level-dependent sound-restoration ear muffs《声学 听力保护器 电平相关声音恢复耳罩的有效声压级测量》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN ISO 4869-4:2000 The

2、 European Standard EN ISO 4869-4:2000 has the status of a British Standard ICS 13.340.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Acoustics Hearing protectors Part 4: Measurement of effective sound pressure levels for level-dependent sound-restoration ear muffs (ISO/TR

3、4869-4:1998)This British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 August 2000 BSI 08-2000 ISBN 0 580 34952 7 BS EN ISO 4869-4:2000 Amendments issued sinc

4、e publication Amd. No. Date Comments National foreword This British Standard is the official English language version of EN ISO 4869-4:2000. It is identical with ISO/TR 4869-4:1998. The UK participation in its preparation was entrusted to Technical Committee PH/7, Hearing protection, which has the r

5、esponsibility to: aid enquirers to understand the text; present to the responsible international/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.

6、 A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding Europea

7、n publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A Briti

8、sh Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front

9、 cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO/TR title page, pages ii to iv, pages 1 to 7, the annex ZA page, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.EUROPEANSTAND

10、ARD NORMEEUROPENNE EUROPISCHENORM ENISO48694 May2000 ICS13.340.20 Englishversion AcousticsHearingprotectorsPart4:Measurementof effectivesoundpressurelevelsforleveldependentsound restorationearmuffs(ISO/TR48694:1998) AcoustiqueProtecteursindividuelscontrelebruitPartie 4:Mesuragedesniveauxeffectifsdep

11、ressionacoustique desserrettesdestinslarestitutionduson(ISO/TR 48694:1998) AkustikGehrschtzerTeil4:Messungderwirksamen SchalldruckpegelvonKapselgehrschtzernmit pegelabhngigerelektroakustischer bertragungseinrichtung(ISO/TR48694:1998) ThisEuropeanStandardwasapprovedbyCENon10April2000. CENmembersarebo

12、undtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. This

13、EuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cz

14、echRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG CentralSecretariat:ruedeStassart,36B1050Brussels 2000C

15、EN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO48694:2000EForeword ThetextoftheInternationalStandardfromTechnicalCommitteeISO/TC43“Acoustics“ofthe InternationalOrganizationforStandardization(ISO)hasbeentakenoverasanEuropeanStandardby TechnicalCom

16、mitteeCEN/TC211“Acoustics“,thesecretariatofwhichisheldbyDS. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofan identicaltextorbyendorsement,atthelatestbyNovember2000,andconflictingnationalstandards shallbewithdrawnatthelatestbyNovember2000. ThisEuropeanStandardhasbe

17、enpreparedunderamandategiventoCENbytheEuropean CommissionandtheEuropeanFreeTradeAssociation,andsupportsessentialrequirementsofEU Directive(s). AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthe followingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium

18、,CzechRepublic, Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands, Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom. Endorsementnotice ThetextoftheInternationalStandardISO48694:1998hasbeenapprovedbyCENasaEuropean Standardwithoutanymodification. NOTE:Normat

19、ivereferencestoInternationalStandardsarelistedinannexZA(normative). EN ISO 4869-4:2000A Referencenumbe r ISO48694:1998 (E) TECHNICAL REPORT ISO/TR 48694 Firstedition 19981001 AcousticsHearingprotectors Part4: Measurementofeffectivesoundpressure levelsforleveldependentsoundrestoration earmuffs Acoust

20、iqueProtecteursindividuelscontrelebruit Partie4:Mesuragedesniveauxeffectifsdepressionacoustiquedesserre ttedestinslarestitutionduson EN ISO 4869-4:2000ii Foreword ISO(theInternationalOrganizationforStandardization) isaworldwide federationofnationalstandardsbodies(ISOmemberbodies).Thework of preparin

21、gInternationalStandardsisnormallycarriedoutthroughISO technicalcommittees.Eachmemberbodyinterestedinasubjectfor which atechnicalcommitteehasbeenestablishedhas the right to be represented onthatcommittee.Internationalorganizations,governmenta landnon governmental,inliaisonwithISO,alsotakepartinthewor

22、k.ISO collaboratescloselywiththeInternationalElectrotechnicalCommission (IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordanc ewiththerulesgivenin theISO/IECDirectives,Part3. ThemaintaskoftechnicalcommitteesistoprepareInternational Standards,butinexceptional

23、circumstancesatechnicalcommitteemay proposethepublicationofaTechnicalReportofoneofthefollowingtypes: type1,whentherequiredsupportcanno tbeobtainedforthe publicationofanInternationalStandard,despiterepeatedefforts; type 2, when the subject isstillundertechnicaldevelopmentorwhere foranyotherreasonther

24、eisthefuturebutno timmediatepossibility ofanagreementonanInternationalStandard; type3,whenatechnicalcommitteehascollecteddataofadifferent kindfromthatwhichisnormallypublishedas anInternational Standard(“stateoftheart”,forexample). Technical Reportsoftypes1and2aresubjecttoreviewwithinthreeyears ofpub

25、lication,todecidewhetherthey can be transformed into International Standards.TechnicalReportsoftype3donotnecessarilyhavetobe reviewed until thedatatheyprovideareconsideredtobenolongervalidor useful. ISO/TR48694,whichisaTechnicalReportoftype2,wasprepare dby TechnicalCommitteISO/TC43, Acoustics,Subcom

26、mitteeSC1, Noise. EN ISO 4869-4:2000iii AfirstCD48694,doc.43/1N924,base dona miniaturemicro phonetechnique,wascirculatedforcommentsintheperiod 19940630/19940930.Thecomments,givenindoc.43/1N948,showed thatsuchadraftcouldnotbeexpectedtoobtainsufficientsupport . WG 17 thenpreparedacompletelyreviseddraf

27、tbasedo na simplifiedprocedure andusinganartificialtestfixture(ATF) whichwascirculatedasasecond CD,doc.43/1N972,intheperiod19950101/19950310. Thecommentsgivenindoc.43/1N985,showe dthatthesecond CD 4869 4 didnothavemajorsupporteither.WG17thereforeprepareda reviseddocument,stillbasedontheATF butwithth

28、escoperestrictedto soundrestorationearmuffswhichwascirculatedasaDraftTechnical Report,doc.43/1N986,intheperiod19951010/19960110.Thevotes andcomments,givenindoc.43/1N1039,showed16approvalsand4 disapprovals. Basedonthesecomments,WG17preparedaseconddraftTechnical Report48694,doc.43/1N1069,whichwas circ

29、ulatedforvotinginthe period19970515/19970820andapprovedwit h15approvalsand2 disapprovalsasgivenindoc.43/1N1148.Thetwodisapprovalswere requestingatechniquebasedontheuseofminiaturemicrophoneswhich cannotbeincorporatedinthepresentdocument.Thus,thesecondTR, withsomeeditorialamendments,isissuedasaTechnic

30、alReport,an dthe questionofthepreparationofapossiblestandardbasedonaminiature microphonetechniquemustbethesubjectofaseparatediscussionand decisioninISO/TC43/SC1. ISO48694consistsofthefollowingparts,underthegeneraltitle AcousticsHearingprotectors : Part1:Subjectivemethodforthemeasurementofsoundattenu

31、ation Part 2:EstimationofeffectiveAweightedsoundpressurelevels whenhearingprotectorsareworn Part3:Simplifiedmethodforthemeasurementofinsertionlossof earmufftypeprotectorsforqualityinspectionpurposes Part 4:Measurementofeffectivesoundpressurelevelsforlevel dependentsoundrestorationearmuffs AnnexAofth

32、ispartofISO4869isforinformationonly. EN ISO 4869-4:2000iv Introduction Measurement ofsoundattenuationaccordingtoISO48691isintendedfor conventional,passivehearingprotectorswheretheattenuationisin dependentofthelevelofthenoiseoutsidethehearingprotector.Hearing protectorswithleveldependentoperationarea

33、lsoavailable.Suchoper ationisusuallyobtainedbymeansofelectroacoustic components.The leveldependentcharacteristicsofsuchprotectorscannotbedetermined usingtheproceduresofISO48691.Th e present technical report provides aphysicalmethodforthedeterminationofthecharacteristicsoflevel dependentsoundrestorat

34、ionearmuffs.Thepassivesoundattenuation characteristicsofsoundrestorationearmuffsshouldbemeasure din accordancewithISO48691. EN ISO 4869-4:20001 AcousticsHearingprotectors Part4: Measurementofeffectivesoundpressurelevelsforleveldependent soundrestorationearmuffs 1Scope ThisTechnicalReportspecifiesaph

35、ysicaltestmethodforleveldependentsoundrestorationearmuffs.The physical measurements are made withtheacoustictestfixture(ATF)accordingtoISO/TR48693orwithasuitable headandtorsosimulator(HATS)withasuitableacousticisolation(seeclause7).Theresultsofthesetestsin combinationwiththeresultsfromtheISO48691tes

36、tscanbeusedtoestimatetheeffectiveAweightedsound pressurelevelwhensoundrestorationearmuffsareworn. The method described is notsuitableformeasurementoftheeffectivesoundpressurelevelunderearmuffsinthe caseofimpulsivenoisenorforactivenoisereductionearmuffs. 2Normativereferences The followingnormativedoc

37、umentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsof thispartofISO 4869.Fordatedreferences,subsequentamendmentsto,or revisionsof,anyofthesepublications donotapply.However,partiestoagreementsbasedonthispartofISO4869areencouragedtoinvestigatethe possibilityofapplyingthemostre

38、centeditionsofthenormativedocumentsindicatedbelow .Forundated references,thelatesteditionofthenormativedocumentreferredtoapplies.MembersofIECan dISOmaintain registersofcurrentlyvalidInternationalStandards. ISO48691:1990, AcousticsHearingprotectorsPart1:Subjectivemethodforthemeasurementofsound attenu

39、ation. ISO48692, AcousticsHearingprotectorsPart2:EstimationofeffectiveAweightedsoundpressurelevels whenhearingprotectorsareworn. ISO/TR48693:1989, AcousticsHearingprotectorsPart3:Simplifiedmethodforthemeasurementofinsertion lossofearmufftypeprotectorsforqualityinspectionpurposes. IEC60651, Soundleve

40、lmeters. IEC610944, MeasurementmicrophonesPart4:Specificationsforworkingstandardmicrophones. IEC61260, ElectroacousticsOctavebandandfractionaloctavebandfilters. EN ISO 4869-4:20002 3Termsanddefinitions ForthepurposesofthisTechnicalReport,thetermsanddefinitionsgive ninISO48691,ISO48692and ISO/TR48693

41、,andthefollowingapply. 3.1 referencemicrophone calibratedmicrophonemeetingtherequirementsforWS2DmicrophonesgiveninIEC610944 ,notlocatedinthe acoustictestfixture,whichisusedtomeasuresoundpressurelevelsinthetestchamber 3.2 referencepoint location in the test chambertowhichallacousticalmeasurementsarer

42、eferred,andatwhichthemidpointofaline connectingthecentresofthetwoendfacesoftheacoustictestfixtureislocated 3.3 soundrestorationearmuff soundtransmissionearmuff earmuffintendedtoreproduceexternalsoundswithintheearcup NOTE Asoundrestorationearmuffexhibitsachangeinattenuationasafunctionofsoundpressurel

43、evel(i.e.level dependency). 3.4 pinknoise noisewhosepowerspectraldensityisinverselyproportionaltofrequency 3.5 effectiveAweightedsoundpressurelevelforleveldependentsoundrestorationearmuffs foraspecificnoisesituation,theAweightedsoundpressureleveleffectivewhenagivenleveldependentsound restoration hea

44、ring protector is worn, calculated from resultsofmeasurementsonATF/HATSinactiveandpassive modeandwithcorrectionsforboneconductionandleakage NOTE InthisTechnicalReport,effectivesoundpressurelevelisthecombinedeffectofinsertionlossandsound transmission. 4Testconditions 4.1Testsite RandomincidencesoundfieldconditionsarerequiredasdescribedinISO48691