earphone test standard v1nf手機(jī)耳機(jī)測試

NFNFTechnologyHK keepSecretNFearphonetestPAGEPAGE2VersionSl.Created/ModifiedAmendment1Sanso234567Thisfileisconfidential.Recipient(s)is(are)obligatedtomaintainsecrecyandis(are)notpermittedtodisclosethecontentsofthisfiletoothers.Thankyou.Version Purpose目 Scope范 electricperformancetest電氣性能測 Directcurrentresistancetest直流電阻測 sensitivitytest靈敏度測 harmonicdistortiontest諧波失真測 Puretonetest純音掃頻測 Receiverfrequencyresponsetest耳機(jī)頻率響應(yīng)測 Microphonefrequencyresponsetest麥克風(fēng)頻率響應(yīng)測 RFinterferencetest射頻干擾測 Insertconsumptiontest插入電流測 Earphonecallingtest通話測 Reliabilitytest可靠性測 plugtest插拔壽命測 Plugin/outforcetest拔出力測 Bendingtest彎折測 Pullouttest拉力測 Receiverloadtest壽命測 dampheattest濕熱測 freedroptest跌落測 saltmisttest鹽霧測 PurposeThisstandardistheEarphonequalityacceptancecriterion,toensureNFCperformancemeetthequalityrequirements,makesureproductquality,andprovidethejudgmentstandardfortheinspectionScopeThisstandardwillbeappliedtoEarphoneevaluationandsampleinspectionforallNF’sproductswithearphoneTestequipmentsandrequirementsAtmosphericelectricperformancetestDirectcurrentresistancetestUsethemultimetertomeasuretwoendofthereceiverandthedirectcurrentresistanceofearphoneshouldbethedirectcurrentresistanceofmicrophoneshouldbe2.2k±10ΩsensitivitytestSeparatelyinput a1kHz,1mwsinewavesignaltothereceiverandMIC,usetheelectroacoustictestertomeasurethesensitivityearphonesensitivityshouldbewithinmicrophonesensitivityshouldbewithin-harmonicdistortiontestinputa200~3kHzsinesignaltoearphone,whentheoutputSPL94db,100db,measuretheTheresultshouldbesatisfiedbelowrequirementSPL=94db,distortion≤1%SPL=100db,PuretonetestInputa20~2kHzsinesignal,fromlowfrequencytohighfrequency,andthenlisten.theearphonenocrackandothernoise.ReceiverfrequencyresponsetestInputasinesignaltotheearphone,testtheoutputSPLwithelectrocacoustictesterPasscriteriaasFrequencyResponsewithin±3dB,200~4KHzfrequencycurvewithinlowerandupperlimit,asbelowfigureMicrophonefrequencyresponsetestTestthemicrophonefrequencyresponsewithelectroacoustictesterThefrequencyresponsecurveshouldsatisfiedbelowfigurerequirement.RFinterferencetestMakeacallwithearphone,normaluseearphoneandintertwinewithphone,theresultshouldnocurrentnoiseatbothside,whichcausebyRFInsertconsumptiontestMeasurethephonestandbycurrentI0,andtheninsertearphone,measurethestandbycurrentI1,theearphoneinsertconsumptionΔI=I1-I0Theresultshould ΔIEarphonecallingtestAccordingtotheNFaudiotestReliabilitytestplugtest5ktimesplugin/out test,theappearance,mechanicalandelectricalperformanceshouldbeokPlugin/outforcetestPlugintheearphonetothephone,andplugout,measuretheplugin/outforce,theforceshouldbe3~20N.BendingtestBottomload300g,bendingangel120°,40times/min,3000times,Thewireshouldn’tbedamage,electricalperformanceshouldbeok.PullouttestExerta30Nforceonthewireexitedpointofspeaker,micandplug,last1min,aftertest,theappearanceandfunctionshouldbeok.ReceiverloadtestInputapinknoisetothereceiver,last96H,aftertest,theearphonefunctionshouldbeok.TemperaturestoragetestAccordingtoNFreliabilitydampheattestAcco