1、BSENISO9612:2025BSIStandardsPublicationAcousticsDeterminationofoccupationalnoiseexposureMethodologybsi.NationalforewordThisBritishStandardistheUKimplementationofENISO9612:2025.ItisidenticaltoISO9612:2025.ItsupersedesBSENISO9612:2009,whichiswithdrawn.TheUKparticipationinitspreparationwasentrustedtoTe
2、chnicalCommitteeEH13,Residentialandindustrialnoise.Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitscommitteemanager.ContractualandlegalconsiderationsThispublicationhasbeenpreparedingoodfaith,howevernorepresentation,warranty,assuranceorundertaking(expressorimplied)isorwillbem
3、ade,andnoresponsibilityorliabilityisorwillbeacceptedbyBSIinrelationtotheadequacy,accuracy,completenessorreasonablenessofthispublication.Allandanysuchresponsibilityandliabilityisexpresslydisclaimedtothefullextentpermittedbythelaw.Thispublicationisprovidedasis,andistobeusedattherecipientsownrisk.There
4、cipientisadvisedtoconsiderseekingprofessionalguidancewithrespecttoitsuseofthispublication.Thispublicationisnotintendedtoconstituteacontract.Usersareresponsibleforitscorrectapplication.TheBritishStandardsInstitution2025PublishedbyBSIStandardsLimited2025ISBN9780539209907ICS13.140;17.140.20;17.140.50Co
5、mpliancewithaBritishStandardcannotconferimmunityfromlegalobligations.ThisBritishStandardwaspublishedundertheauthorityoftheStandardsPolicyandStrategyCommitteeon30June2025.Amendments/corrigendaissuedsincepublicationDateTextaffectedEUROPEANSTANDARDNORMEEUROPEENNEEuropaischenormBSENISO9612:2025ENISO9612
6、June2025Akustik-BestimmungderLarmexpositionamArbeitsplatz-Methodik(ISO9612:2025)ICS13.140SupersedesENISO9612:2009EnglishVersionAcoustics-Determinationofoccupationalnoiseexposure-Methodology(ISO9612:2025)Acoustique-Determinationde!expositionaubruitenmilieudetravail-Methodologie(ISO9612:2025)ThisEurop
7、eanStandardwasapprovedbyCENon5March2024.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapp
8、licationtotheCEN-CENELECManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthesamestatusastheofficialver
9、sions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slove
10、nia,Spain,Sweden,Switzerland,TiirkiyeandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITEEUROPEENDENORMALISATIONEuropaischeskomiteefurnormungCEN-CENELECManagementCentre:RuedelaScience23,B-1040Brussels2025CENAllrightsofexploitationinanyformandbyanymeansreservedRef.No.ENISO9612:2025Eworldwidefor
11、CENnationalMembers.EuropeanforewordThisdocument(ENISO9612:2025)hasbeenpreparedbyTechnicalCommitteeISO/TC43AcousticsincollaborationwithTechnicalCommitteeCEN/TC211Acoustics“thesecretariatofwhichisheldbyDIN.ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltex
12、torbyendorsement,atthelatestbyDecember2025,andconflictingnationalstandardsshallbewithdrawnatthelatestbyDecember2025.Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.CENshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Thisdocumentsupersed
13、esENISO9612:2009.Anyfeedbackandquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody/nationalcommittee.AcompletelistingofthesebodiescanbefoundontheCENwebsite.AccordingtotheCEN-CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesareboundtoimplementthisE
14、uropeanStandard:Austria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,Ti
15、irkiyeandtheUnitedKingdom.EndorsementnoticeThetextofISO9612:2025hasbeenapprovedbyCENasENISO9612:2025withoutanymodification.ContentsPageForewordVIntroductionvi2 Normativereferences13 Termsanddefinitions14 Symbols35 Instrumentation55.1 Soundlevelmetersandpersonalsoundexposuremeters55.2 Calibrator55.3
16、Periodicverification66 Methodology-Chronologicalsteps66.1 Step1:Workanalysis66.2 SteP2:SelectionofthemeasurementStrategy66.3 Step3:Measurements66.4 Step4:Errorhandlinganduncertainties66.5 Step5:Calculationandpresentationofresultsanduncertainty67 Workanalysis67.1 General67.2 Defininghomogeneousnoisee
17、xposuregroups(HEG)77.3 Determinationofanominalday78 Selectionofmeasurementstrategies88.1 General88.2 Measurementstrategies89 Strategy1-Task-basedmeasurement89.1 Dividingthenominaldayintotasks89.2 Durationoftasks89.3 MeasurementofLPAeqTmfortasks99.3.1 General99.3.2 Numberofmeasurements99.3.3 Timeandd
18、urationofmeasurements109.3.4 CalculationoftheA-weightedequivalentcontinuoussoundpressurelevel109.4 Calculationofcontributionfromeachtasktodailynoiseexposurelevel109.5 Determinationofdailynois6exposurelvl1110 Strategy2-Job-basedmeasurement210.1 General1210.2 Measurementplan-Number,durationanddistribu
19、tionofmeasurements1210.3 Measurements1210.4 Determinationofdailynoiseexposurelevelsforworkersinahomogeneousnoiseexposuregroup1311 Strategy3Full-daymeasurement1311.1 General1311.2 Observingworkactivitiesandmonitoringmeasurements1411.3 Measurements1411.4 Determinationofdailynoiseexposurelevel1512 Meas
20、urements1512.1 Selectionofinstrumentation1512.2 Fieldcalibration1512.3 Instrumentwornbytheworker1512.4 Integrating-averagingsoundlevelmeter1613 Sourcesofuncertaintyanderrors1713.1 General1713.2 Mechanicalimpactsonmicrophone1713.3 Windandairflows1813.4 Relevanceofsoundcontributions1814 Calculationofm
21、easurementuncertaintiesandpresentationofthefinalresults1815 Informationtobereported18AnnexA(informative)Exampleofachecklisttoensurethatsignificantnoiseeventsaredetectedduringtheworkanalysis21AnnexB(informative)Guidancetotheselectionofmeasurementstrategy.22AnnexC(normative)Evaluationofmeasurementunce
22、rtainties25AnnexD(informative)Exampleshowingcalculationofdailynoiseexposurelevelusingtaskbasedmeasurements34AnnexE(informative)Exampleshowingcalculationofdailynoiseexposurelevelusingjob-basedmeasurements39AnnexF(informative)Samplecalculationofdailynoiseexposurelevelusingfull-daymeasurements42Annex G
23、 (informative)Examplecalculationofdailynoiseexposurelevelforflexibleworkers45Annex H (normative)Uncertaintycalculationforpeaksoundpressurelevels49Bibliography53ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).Theworkofprepari
24、ngInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcoll
25、aboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthedifferenttypesof
26、ISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/divectives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplicabilityof
27、anyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.However,implementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatWWW.iso.org/paten
28、ts.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityassessment,aswe
29、llasinformationaboutISOsadherencetotheWorldTradeOrganization(WTo)principlesintheTechnicalBarrierstoTrade(TBT),seeWWW.iso.org/iso/foreword.html.ThisdocumentwaspreparedbyTechnicalCommitteeISO/TC43,Acoustics,SubcommitteeSC1,Noise,incollaborationwiththeEuropeanCommitteeforStandardization(CEN)TechnicalCo
30、mmitteeCEN/TC211,Acoustics,inaccordancewiththeAgreementontechnicalcooperationbetweenISOandCEN(ViennaAgreement).Thissecondeditioncancelsandreplacesthefirstedition(ISO9612:2009),whichhasbeentechnicallyrevised.Themainchangesareasfollows: AreshapingoftheguidanceonmeasurementofLPAeqTmforthetask-basedstra
31、tegyf9.3). Arevisionofthemeasurementplanforthejob-basedstrategyfl.2). TheadditionofHomogeneousnoiseExposureGroups(HEG)samplingrequirementsforthefull-daymeasurementstrategyandtheadditionofcriteriatovalidatesamplingfll.3). Someprecisionsandclarificationsontheinstrumentationsection. Someadditionstothet
32、estreportsection:numberofpeakevents,EX,8h,95% TheadditionofC1ZinArmeXC,whichgivestheformulaetocalculatethemeasurementuncertaintywhenmultiplenominaldaysareused.AnAnneXHisalsointroducedtoclarifyuncertaintyofpeakmeasurements. TheintroductionofanewAmleXG. TheintroductionofanewAmleXH. AfullrevisionoftheE
33、xcelcalculationfileattachedtothisdocument.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody.AcompletelistingofthesebodiescanbefoundatWWW.iso.org/members.html.IntroductionThisdocumentprovidesastepwiseapproachtothedeterminationofoccupationalnoiseexposurefromnoiselevel
34、measurements.Theprocedurecontainsthefollowingmajorsteps:workanalysis,selectionofmeasurementstrategy,measurements,errorhandlinganduncertaintyevaluations,calculations,andpresentationofresults.Thisdocumentspecifiesthreedifferentmeasurementstrategies:task-basedmeasurement;job-basedmeasurement;andfull-da
35、ymeasurement.Thisdocumentgivesguidanceonselectinganappropriatemeasurementstrategyforaparticularworksituationandpurposeofinvestigation.Thisdocumentalsoprovidesaninformativespreadsheettoallowcalculationofmeasurementresultsanduncertainties.ISOisnotresponsibleforerrorsthatshallariseoroccurwiththeuseofth
36、isspreadsheet.Thisdocumentrecognizestheuseofhand-heldsoundlevelmetersaswellaspersonalsoundexposuremeters.Themethodsspecifiedoptimizetheeffortrequiredforobtainingagivenaccuracy.AcousticsDeterminationofoccupationalnoiseexposure一Methodology1ScopeThisdocumentspecifiesamethodformeasuringworkersexposureto
37、noiseinaworkingenvironmentandcalculatingthenoiseexposurelevel.ThisdocumentdealswithA-weightedlevelsbutisapplicablealsotoC-weightedlevels.Threedifferentstrategiesformeasurementarespecified.Themethodisapplicablefordetailednoiseexposurestudiesorepidemiologicalstudiesofhearingdamageorotheradverseeffects
38、Themeasuringprocessrequiresobservationandanalysisofthenoiseexposureconditionssothatthequalityofthemeasurementscanbecontrolled.Thisdocumentprovidesmethodsforestimatingtheuncertaintyoftheresults.Thisdocumentisnotintendedforassessmentofmaskingoforalcommunicationorassessmentofinfrasound,ultrasoundandno
39、n-auditoryeffectsofnoise.Itdoesnotapplytothemeasurementofthenoiseexposureoftheearwhenhearingprotectorsareworn.Resultsofthemeasurementsperformedinaccordancewiththisdocumentcanprovideusefulinformationwhendefiningprioritiesfornoisecontrolmeasures.2 NormativereferencesThefollowingdocumentsarereferredtoi
40、nthetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.ISO1999,AcousticsEstimationofnoise-inducedhearinglossISO/IECGuide98-3,Uncertain
41、tyofmeasurementPart3:Guidetotheexpressionofuncertaintyinmeasurement(GUM:1995)IEC60942,ElectroacousticsSoundcalibratorsIEC61252,ElectroacousticsSpecificationsforpersonalsoundexposuremetersIEC61672-llElectroacousticsSoundlevelmetersPart1:Specifications3 TermsanddefinitionsForthepurposesofthisdocument,
42、thefollowingtermsanddefinitionsapply.ISOandIECmaintainterminologydatabasesforuseinstandardizationatthefollowingaddresses: ISOOnlinebrowsingplatform:availableathttps:WWW.iso.org/obp IECElectropedia:availableathttps:WWW.electropedia.org/3.1A-weightedequivalentcontinuoussoundpressurelevelLPAeqTtentimes
43、thelogarithmtothebase10oftheratioofthetimeaverageofthesquareoftheA-weightedsoundpressure,pA,duringastatedtimeintervalofdurationT(startingatt1andendingatt2)ltothesquareofareferencevalue,p0,expressedindecibels:%A(0dtILp,A,eqT=l。IgI装dB巾-wherethereferencesoundpressure,p0,is20PaNote1toentry:AdaptedfromIS
44、O/TR25417:2007.3.2A-weightednoiseexposurelevelnormalizedtoan8hworkdayEX,8hdailynoiseexposurelevel,indecibels,givenbytheformula:LEX,8h=Lp,A,eqTe+llgTwhereA,eqTeistheA-WeightedequivalentcontinuoussoundpressurelevelforTeTeistheeffectiveduration,inhours,oftheworkingday;T0isthereferenceduration,T0=8h.Not
45、e1toentry:Iftheeffectivedurationoftheworkingday,Te,isequalto8h,thenL8hequalsLp,A,eq8h-Note2toentry:Iftheaverageornormalizedexposureoveranumberofdaysisdesired,thefollowingformulacanbeused:%8h=o*t=EXGdBJwhereXisthedailynoiseexposurelevelfordayx.ThevalueOfXiSchosenaccordingtothepurposeoftheaveragingpro
46、cess.Forexample,X=Sleadstoadailynoiseexposurelevelnormalizedtoanominalweekoffive8hworkingdays.Note3toentry:ThisdefinitiondiffersfromthatgiveninISO/TR25417:2007.3.3nominaldayworkingdayoverwhichitischosentodeterminethenoiseexposureNote1toentry:Thenominaldayisdeterminedfromtheworkanalysisanddependsonth
47、epurposeofthemeasurements.Seealso7.3.Note2toentry:Thenoiseexposurelevelisnormallycalculatedonadailybasis,buttherecanbecircumstanceswheretheuseofweeklyorlongernoiseexposureperiodsisconsideredappropriate.Note3toentry:Thenominaldaycanbeasynthesizedworkingdaythatincludesfragmentsofdifferentrealworkingda
48、ysofaweekorofseveralconsecutiveweeks.3.4C-weightedpeaksoundpressurelevelp,Cpeaktentimesthelogarithmtothebase10oftheratioofthesquareoftheC-weightedpeaksoundpressure,PCPeak，tothesquareofareferencevalue,PO,expressedindecibelsLp,Cpeak=IOlg鳖。B。pwherethereferencesoundpressure,Pois20Pa3.5taskdistinctpartofaworkersoccupationalactivityNot
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