反射系数PtA= Pia +PrAPiA-cose, + Pr- cos0, = Pu coso -PrA cos0P2C2PiCiPiCiP2C2cos0cosO,cosecosO,pPiPiCiP2C2PiCP2C2cose,cose,PiC, cosO,-P2C2 cosOP,C2PCPrAcosO,cosO,PiCi cosO, + P2C2 cos0PiaP2C2PiC
反射系数 = + ppp rAiAtA t i t i t i t i iA rA t i rA t i iA r rA i iA t rA t iA c c c c cc cc p p r cc p cc p c p c p c p c p θρθρ θρθρ ρ θ ρ θ ρ θ ρ θ ρ θ ρ θ ρ θ ρ θ θ ρ θ ρ θ ρ θ ρ cos cos cos cos coscos coscos ) coscos () coscos ( cos cos cos cos 11 22 11 22 1122 1122 1122 1122 22 22 11 11 + − = + − == =− + + = −
入射波、反射波、折射波法向声阻抗定文大射波、反射波声阻抗：Zs1 = PiCicos O,P,CR = Zs1ZSIRcos 0,折射波声阻抗：P2C2Zs1cos O
入射波、反射波、折射波法向声 阻抗 定义入射波、反射波声阻抗： 折射波声阻抗： i SRS i S c ZZ c Z θ ρ θ ρ cos cos 11 1 1 11 1 == = t S c Z θ ρ cos 22 1 =
反射系数COSeCOSOPic, cose,-P,c, cosO,P2C2P,CiPrAcosecose,Pic, cosO, + P2C2 cos0,PiaP2C2PiCiZ2-ZsZ,+Zs
反射系数 12 12 11 22 11 22 1122 1122 cos cos cos cos coscos coscos ss ss t i t i t i t i iA rA ZZ ZZ c c c c cc cc p p r + − = + − = + − == θρθρ θρθρ ρ θ ρ θ ρ θ ρ θ
透射系数Pu cos 0, + Pu cos O, = Pu (cos O, + cos 0)P,C2P,CiPiC2 cos0,2Z,2PiCiPup=cos O,cOsO,Z,2 + Zs1PiAP2C2PIC
透射系数 12 2 22 11 11 22 11 11 2 coscos cos2 cos cos )cos(cos ss s t i i iA tA p i i iA i tA t tA ZZ Z cc c p p t c p c p c p + = + == + = + ρ θ ρ θ ρ θ θθ ρ θ ρ θ ρ
垂直入射介质1介质2PPP++x0垂直入射声波的反射与透射PrA0202-01C1Pia02C2+P1C1202c2PtAPiAP2C2+01C1
垂直入射