ISO-3745-2003-声学.利用声压测定噪声源的声功率级.消声室和半消声室的精确方法

INTERNATIONALSTANDARD15037458econdedition2003-12-01Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundpressure-Precisionmethodsforanechoicandhemi-anechoicroomsAcoustique-Déterminationdesniveauxdepuissanceacoustiqueémisparlessourcesdebruitàpartirdelapressionacoustique-Méthodesdelaboratoirepourlessallesanécho问uesetsemi-anéchoi与ues三方在窗辰三王S缸三当~些三Referencenumber1803745:2003(E)。18020031503745:2003(E)PDFdisclaimerThisPDFfilemaycontainembeddedtypefaces.InaccordancewithAdobe'slicensingpolicy,thisfilemaybeprintedorviewedbutshallnotbeeditedunlessthetypefaceswhichareembeddedarelicensedtoandinstalledonthecomputerperformingtheediting.Indownloadingthisfile,partiesacceptthereintheresponsibilityofnotinfringingAdobe'slicensingpolicy.The150Central5ecretariatacceptsnoliabilityinthisarea.AdobeisatrademarkofAdobe5ystemsIncorporated.DetailsofthesoftwareproductsusedtocreatethisPDFfilecanbefoundintheGeneralInforelativetothefile;thePDF-creationparameterswereoptimizedforprinting.Everycarehasbeentakentoensurethatthefileissuitableforuseby150memberbodies.Intheunlikelyeventthataproblemrelatingtoitisfound,[e-mail],nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronicormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromeither150attheaddressbelowor150'smemberbodyinthecount叩oftherequester.150copyrightofficeCasepostale[e-mail]@1502003-AIIrightsreserved1803745:2003(E)ContentsPageForeword.........................….................….....................….........................….............................….........................vIntroduction........…...............................….......................…...............….......................…....................................vi1Scope.................…........................….........…...........................................................................................12Normativereferences.........….............................…................................................…............................13Termsanddefinitions.............................,...............................…........…..............……....,........................24Measurementuncertainty........….....................................….........................….................................,.....55Testroomrequirements.........,.....,.....….................................…...............................................,....,.....,65.1General.......…..............................,..,..,......,.,.......,..........,..............................,.......................,..,..,....,....,,65.2Criterionforadequacyofthetestroom............,...............,............................….........................,.....,.75,3Criterionforbackgroundnoise.....,....…........................................…..........................…..................….75.4Criterionfortemperature.....................,..,...................................….........................................…...........75.5Humiditycorrection................................,.................................,..…................…..............................,....76Instrumentation.........,...................,.........,.................................................…............................,............76.1General.............…..............................…..................…................…............................….......................….76.2Calibration.,.....….............................................…..,....................,......................................,......,......,......,87Installationandoperationofsourceundertest...................,.....................................................,.......87.1General..........…................................................….........….................….......….........….........,..............,....87.2Sourcelocation...,...................................,.............…........…....................................@1802003-AIIrightsreserved·l·l·l1503745:2003(E)AnnexC(normative)Arrayofmicrophonepositionsinafreefield............................................................28AnnexD(normative)Arrayofmicrophonepositionsinafreefieldoverareflectingplane....................29AnnexE(normative)Coaxialcircularpathsofmicrophonesinahemi-freefield.....................................31AnnexF(normative)Meridionalpathsofmicrophonesinahemi-freefield....…............................…........32AnnexG(normative)Spiralpathsofmicrophonesinahemi-freefield....…..................................…..........34AnnexH(normative)CalculationofA-weightingsoundpowerlevelfromone-third-octave-bandsoundpowerlevels............................…..........................….........…................................…..................35AnnexI(normative)Calculationo