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Effects of spatially varying interfacial parameters on the propagation ofsurface waves are studied. These variations can arise from inhomogeneities incoverage of surface active substances such as amphiphillic molecules at thefluid/gas interface. Such variations often occur in phase coexistence regionsof Langmuir monolayers. Wave scattering from these surface inhomogeneities arecalculated in the limit of small variations in the surface parameters by usingthe asymptotic form of surface Green's functions in the first order Bornapproximation. When viscosity and variations in surface elastic moduli becomeimportant, modes other than transverse capillary waves can change thecharacteristics of propagation. Scattering among these modes provides amechanism for surface wave attenuation in addition to viscous damping on ahomogeneous surfactant covered interface. Experimental detection of wavesattenuation and scattering is also discussed.Comment: 11 pages; 8 figures on reques

Surface wave scattering at nonuniform fluid interfaces