ISO 26101-1-2021.docx

INTERNATIONA1.STANDARDISO26101-1editionFiret2021-05AcousticsTestmethodsforthequa1.ificationoftheacousticenvironment一建胴IiqCatiOnoffree-fie1.denvironmentsAcousUqueMethodesd'essaipour1.aqua1.ificationdeVenvironnementacoustiquePartie1:Qua1.ificationdesenfironnementsenchampIihreReferencenumberISO26101-1.:2021(E)COPYRIGHTPROTECTEDDOCUMENT©ISO2021岫rkdea/山thUcdOthcnviscjft<c三orrtmcehDVBiwixuioiti08phnn11UatiocBhr<1.>hotoc<>p)Mng,ptbcatonpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanherequestedfromeitherISOattheaddressbe1.owOr1.sOXSmemberbodyinthecountryoftherequester.%,tft晒Iandonnet8CH-1214*crnicr,GenevaPhone：M1.22749O1.11帆禅igjWft.orgPub1.ishedinSwitzerhnd©ISO2021-A1.1.rightsreservedIntroductionenvironmentprovideasoundsoundiffie1.dOrboundingsoundsurfacesoverref1.ectingsoundp1.ane.energiesacoustica1.inaconfinedspacewithinthefaci1.ity.Internationa1.Standardsqua1.ificationproceduresout1.inedincases,documentdocumentsreferedtoreference1-A1.1.11ghtsreservedThisdocumentdescribesthedivergence1.ossmethodofmeasurementofperformanceofanenvironmentdesignedisafreefreefie1.dithasfreefie1.dthatabsorba1.1.Anincidentuponthem.Thisisnorma1.1.yachievedusingspecia1.izedtestenvironments,suchasanechoicorhemi-anechoicchambers.Inpractice,theseprovideacontro1.1.edfreesoundfie1.dforacoustica1.measurementsThepurposeofthisdocumentistopromoteuniformityinthemethodandconditionsofmeasurementwhenqua1.ifyingfreesoundfie1.denvironments.isexpectedthattheandindustrytestcodes.Insuchthisthesevri1.1.bemakingbyothertothisdocumentmayspecifyqua1.ificationcriteriaappropriateforthetestmethodandmayrequirespecifictraversepaths.isaninput5wapparatus;quantitytoa1.1.owforanyuncertaintyduetoref1.ectionsfromthemeasuring611hodisaninputquantitytoa1.1.owforanyuncertaintyduetotheapp1.iedmeasurementmethod：&ncnisaninputquantitytoa1.1.owforanyuncertaintyduetothecorrectionforabsorptionofsoundbytheatmosphere；6resdisaninputquantitytoa1.1.owforanyunaccountedforresidua1.uncertainties.睥Tfccthci1.<rtofqknotddgcind1.thttidmkwh三MH1.)ddUnwibVib<三Dptaip1.11tathuthUghtoctecarchcou1.drevea1.thatthereareothers.N端向es桶柞解楸a1.ionp斌蚪百蒯曲脚曲片沙猴而百耙四糖相加1.1.Of瞄IetWeeHP11加加眼SWeensomeoftheinputquantities.A帆福幅t"假砥栩肛儡V曲网叫慨郎,bestSt融福iet咨设1.1.ea题猴熄Mth就t/曲HtfM)Utitsstandarddeviationisameasureofthedispersionofva1.ues.Theuncertaintyintheestimateoftheinputquantityistermedthestandarduncertainty.Itisafunctionofthestandarddeviation,probabi1.ityC.3distributionandnumberofdegreesoffreedom.ContributionstomeasurementuncertaintyThesensitivitycoefficientsareameasureofhowtheva1.uesofthedeviationsareaffectedbychangesintheva1.uesoftherespectiveinputquauUe7-MaU4Hnatica1.1.y.theseCoefTicientsareequa1.tothepartia1.除帼8版Het他限BB部曲即融阳腑旗她峙t暗魄H似hfcer3e喙晒槽跳SqUantiT般PrOdUetSofthestandarduncertaintiesandtheirassociatesensitivitycoefficients.Forthecaseofneg1.igib1.ecorre1.ationbetweentheinputquantities,thecombinedstandarduncertaintyofthedeterminationofthe忡iat毗如5inversesquare1.aw,w(Ap,)1.isgivenbyPormu1.a(C2):(C2)丽IateStIft(曲阳YiwMaintiesiiiformaHWee峋恤j愉啊Hr叫泪屋柚hftyestaBimi!1.eregArch.AnTheexpandeduncertaintyistypica1.1.ytwicethecombinedstandarduncertain1.yforacoverageprobabi1.ityof95%andassuminganorma1.distribution.AnnexD(informative)Guide1.inesforreferringtothistestmethodD.1.Genera1.Thisdocumentout1.inesatestmethodforquantifyingtheperformanceoffreesoundfie1.denvironmentsfo】MBmiberpurposespermwtiwiasKiErwneNtsayirifcMiHHddUuhyGHMdhhfdfcbUKtdes.pmftftsrt即<riftsMBrnent,aswe1.1.asthequa1.ificationcriteria,havebeenomittedfromthemainbodyofthisdocumentinordertoa1.1.owreferencingdocumentstospecifyappropriatemeasurementparametersandqua1.ificationcriteria.nnexprovidestestparameterspecificationsandqua1.ificationcriteriaintheeventthattheseitemsarenotspecified.Thisannexprovidesguide1.inesforthespecificationoftestparametersandD2qiQB麻f1b怖+F就documents.Referencestothisdocumentshou1.dinc1.udestatementsofthequa1.ificationcriteriastatedasfo1.1.ows.Themaximuma1.1.osvab1.edeviationfrominversesquareIasvsha1.1.notexceed±tdB,Thetestenvironmentsha1.1.bequa1.ifiedoverafrequencyrangeofmHztonHz.Thetestenvironmentsha1.1.beshowntoqua1.ifyusingthecriteriaandfrequencyrangeout1.inedaboveoveradistanceofdm.I1.us1.ptedihhfetoihnvofsetaMtiine«wnnx?nded.range/distance/deviationcriteriaforasing1.eenvironmenttobeD.31.ocationoftestsoundsourcesandmicrophonetraversesD.3.1Testsoundsource1.ocationReferencestothisdocumentshou1.dinc1.udeaspecificationofthenumberand1.ocationofthesource(三)tobeusedtoqua1.ifythespacestatedasfo1.1.ows.Atota1.ofnsourcepositionssha1.1.bequa1.ified.TheCartesiancoordinatesofthesourceposition(三)tobeusedforqua1.ificationare:(xty1.z),W>11R)11mcft(t1.sotihNvH11h4i1.fe<,<dw11bcrgencra1.f1.oor).dcscriptionofthesourceposition(三)withinthetestD.3.2MiCroPhonetraverse