ISO 13472-2 2025.docx

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1、ISOInternationalStandardISO13472-2Secondedition2025-05AcousticsMeasurementofsoundabsorptionpropertiesofroadsurfacesinsitu一Part2:SpotmethodforreflectivesurfacesAcoustiqueMesurageinsitudesproprietesd,absorptionacoustiquedesrevetementsdechausseesPartie2:MethodeponctuellepourIessurfacesreflechissantesRe

2、ferencenumberISO13472-2:2025(en)COPYRIGHTPROTECTEDDOCUMENTISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoran

3、intranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordiv

4、Introductionv2 Normativereferences13 Termsanddefinitions11.1 Measurementprinciple31.2 Signalanalysis41.3 Insitufixture45 Testequipment55.1 Soundsource55.2 Testsignal55.3 ImPedanCetube55.3.1 Tubediameter55.3.2 Tubelengthandmicrophonepositions55.3.3 Microphones65.4 Insitutestfixturebetweenimpedancetub

5、eandtestsurface65.5 Signalprocessingsystem75.6 Thermc)meterandbarometer76 Measurementandanalysisrequirements76.1 StabiliZirlgthesystem76.2 CalibratiOnofthesystem.76.3 Referencemeasurement76.4 Measurementofaroadsurface76.6 One-thirdOCtaVebandabsorptionspectrum.97 Positioningoftheequipment97.1 Locatio

6、nofthemeasurementpositions97.1.1 TestsurfacessuchasthosemeetingISO10844requirements97.1.2 Regularroads97.2 Temperature98 Measurementandanalysisprocedure99 MeaSUremelltUIICertaiIItyrequirements1010 Testreport11Annex A (informative)Correctiononbaseofreferencemeasurement13Annex B (informative)Measureme

7、ntuncertainty14Annex C (informative)Alternativeprocedurestoimproveaccuracy17Annex D (informative)Insitutestfixture20ArlrIeXE(informative)EXaITlPleofatestreport22Bibliography.25ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).

8、TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakeparti

9、nthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthe

10、differenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityo

11、rapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.However,Implementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatW

12、WW.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformit

13、yassessment,aswellasinformationaboutISOsadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT),seeWWW.iso.org/iso/foreword.htmLThisdocumentwaspreparedbyTechnicalCommitteeISO/TC43,Acoustics,SubcommitteeSC1,Noise.Thissecondeditioncancelsandreplacesthefirstedition(ISO1347

14、2-2:2010),whichhasbeentechnicallyrevised.Themainchangesareasfollows: mandatorychoiceofthetransferfunctionformulationandqualityrequirementsforthecoherencefunction; analternativemicrophonearrangementandapplicationofalternatingtransferfunctionsarepresentedtocancelthedistortionduetodestructiveinterferen

15、ceatthemicrophonepositions.AlistofallpartsintheISO13472seriescanbefoundontheISOwebsite.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody.Acompletelistingofthesebodiescanbefoundatwww.iso.org/members.htmLIntroductionThismethodprovidesameanstoevaluatethesoundabsorptioncharacteristicsofaroadsurfacewithoutdamagingthesurface.ThefieldofapplicationislimitedtolowabsorptionsurfacessuchasthoseinaccordancewithISO10844Kandsimilarsurfaces.Duetoairleakagethemethodisnotreliableifthemeasure