IEC62459:2010/COR1:2015–1–IEC2015INTERNATIONALELECTROTECHNICALCOMMISSION____________IEC62459Edition1.02010-01Soundsystemequipment–Electroacousticaltransducers–MeasurementofsuspensionpartsCORRIGENDUM13.11lowestconeresonancefrequencyReplacetheexistingFormula(7)bythefollowingnewFormula:soff0)21mxΚfδ(π≈(7)6.3IncrementaldynamicmeasurementReplacetheexistingfirstsentencebythefollowing:ThistechniqueformeasuringtheincrementalstiffnessKinc(xdc)accordingtoEquation(3)usesasuperpositionofad.c.signalofcertainmagnitude(forexample,constantrestoringforceFdcgeneratingad.c.positionxdc)andasmalla.c.signal(e.g.restoringforceFac)asstimulusandmeasuresthea.c.responseofthesuspensionpart(e.g.thea.c.partofthedisplacementxac)understeady-statecondition.6.4FulldynamicmeasurementReplacetheexistingparagraphbythefollowing:ThistechniqueformeasuringthedynamicstiffnessK(xac)usesana.c.signalofcertainmagnitude(forexample,thea.c.restoringforceFac)andmeasuresthea.c.responseofthesuspensionpart(forexample,adisplacementxac).9.1CharacteristictobespecifiedReplace,inthesecondsentenceofthisparagraph,"Equation(6)"by"Equation(1)".IEC62459:2010-01/COR1:2015-11(en)
