摘要
Inanon-freefield,theexistenceofdisturbingsourceswoulddestroythefree-fieldconditionrequiredbynear-fieldacousticholography,andconfusetheidentificationoftargetsourceduetothescatteringeffectcausedbydisturbingsoundfallingonthetargetsource.Tototallyremovetheinfluenceofdisturbingsource,amethodforrecoveringandreconstructingthetargetsoundfieldinanon-freefieldwasproposedbasedontheequivalentsourcemethodandthepressure-velocitymeasurement.Intheproposedmethod,thesoundfieldseparationtechniquewasfirstlyusedtoseparatethemixedsoundfieldintotheoutgoingfieldcomingfromthetargetsourceandtheincomingfieldcomingfromthedisturbingsource.Thenthescatteredcomponentcontainedintheoutgoingfieldwascalculatedbyusingthedisturbingsoundandthesurfaceimpedanceofthetargetsource.Finally,thesoundfieldradiatedbythetargetsourceinafreefieldwasobtainedbysubtractingthescatteredcomponentfromtheoutgoingfieldandwasfurtherusedtoreconstructthesoundfieldofthetargetsource.Theproposedmethodwasnumericallyandexperimentallytestifiedandtheresultsofboththesimulationandtheexperimentdemonstratedthevalidityoftheproposedmethod.
出版日期
2017年02月12日(中国期刊网平台首次上网日期,不代表论文的发表时间)