BS EN ISO 9612 2025.docx

BSENISO9612:2025BSIStandardsPublicationAcousticsDeterminationofoccupationalnoiseexposureMethodologybsi.NationalforewordThisBritishStandardistheUKimplementationofENISO9612:2025.ItisidenticaltoISO9612:2025.ItsupersedesBSENISO9612:2009,whichiswithdrawn.TheUKparticipationinitspreparationwasentrustedtoTechnicalCommitteeEH13,Residentialandindustrialnoise.Alistoforganizationsrepresentedonthiscommitteecanbeobtainedonrequesttoitscommitteemanager.ContractualandlegalconsiderationsThispublicationhasbeenpreparedingoodfaith,howevernorepresentation,warranty,assuranceorundertaking(expressorimplied)isorwillbemade,andnoresponsibilityorliabilityisorwillbeacceptedbyBSIinrelationtotheadequacy,accuracy,completenessorreasonablenessofthispublication.Allandanysuchresponsibilityandliabilityisexpresslydisclaimedtothefullextentpermittedbythelaw.Thispublicationisprovidedasis,andistobeusedattherecipientsownrisk.Therecipientisadvisedtoconsiderseekingprofessionalguidancewithrespecttoitsuseofthispublication.Thispublicationisnotintendedtoconstituteacontract.Usersareresponsibleforitscorrectapplication.©TheBritishStandardsInstitution2025PublishedbyBSIStandardsLimited2025ISBN9780539209907ICS13.140;17.140.20;17.140.50CompliancewithaBritishStandardcannotconferimmunityfromlegalobligations.ThisBritishStandardwaspublishedundertheauthorityoftheStandardsPolicyandStrategyCommitteeon30June2025.Amendments/corrigendaissuedsincepublicationDateTextaffectedEUROPEANSTANDARDNORMEEUROPEENNEEuropaischenormBSENISO9612:2025ENISO9612June2025Akustik-BestimmungderLarmexpositionamArbeitsplatz-Methodik(ISO9612:2025)ICS13.140SupersedesENISO9612:2009EnglishVersionAcoustics-Determinationofoccupationalnoiseexposure-Methodology(ISO9612:2025)Acoustique-Determinationde!'expositionaubruitenmilieudetravail-Methodologie(ISO9612:2025)ThisEuropeanStandardwasapprovedbyCENon5March2024.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCEN-CENELECManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthesamestatusastheofficialversions.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,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITEEUROPEENDENORMALISATIONEuropaischeskomiteefurnormungCEN-CENELECManagementCentre:RuedelaScience23,B-1040Brussels©2025CENAllrightsofexploitationinanyformandbyanymeansreservedRef.No.ENISO9612:2025EworldwideforCENnationalMembers.EuropeanforewordThisdocument(ENISO9612:2025)hasbeenpreparedbyTechnicalCommitteeISO/TC43"Acoustics"incollaborationwithTechnicalCommitteeCEN/TC211"Acoustics“thesecretariatofwhichisheldbyDIN.ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsement,atthelatestbyDecember2025,andconflictingnationalstandardsshallbewithdrawnatthelatestbyDecember2025.Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.CENshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.ThisdocumentsupersedesENISO9612:2009.Anyfeedbackandquestionsonthisdocumentshouldbedirectedtotheusers'nationalstandardsbody/nationalcommittee.AcompletelistingofthesebodiescanbefoundontheCENwebsite.AccordingtotheCEN-CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesareboundtoimplementthisEuropeanStandard: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,TiirkiyeandtheUnitedKingdom.EndorsementnoticeThetextofISO9612:2025hasbeenapprovedbyCENasENISO9612:2025withoutanymodification.ContentsPageForewordVIntroductionvi2 Normativereferences13 Termsanddefinitions14 Symbols35 Instrumentation55.1 Soundlevelmetersandpersonalsoundexposuremeters55.2 Calibrator55.3 Periodicverification66 Methodology-Chronologicalsteps66.1 Step1:Workanalysis66.2 SteP2:SelectionofthemeasurementStrategy66.3 Step3:Measurements66.4 Step4:Errorhandlinganduncertainties66.5 Step5:Calculationandpresentationofresultsanduncertainty67 Workanalysis67.1 General67.2 Defininghomogeneousnoiseexposuregroups(HE