Abstract:ThispaperpresentsamethodbasedonwaveletenergyspectrumandBPneutralnetwork todetectpreservedeggcracks.Firstly,theacousticresponsewascollectedanddecomposedinto6levels withwavelettransform.Thenthewaveletenergyspectrumwasextractedoneverylevel.Theeigenvectorbasedonwaveletpowerspectrum wasformed,whichwasusedastheinputofBPneutralnetwork. The6-20-2BPneutralnetworkwasbuiltbasedon MATLAB.Theexperimentalexampleachieveda crackdetectionrateof88.5% withnormal-shellpreservedeggs,and83.3% withcracked-shellpreservedeggs