Modelling acousto-elastic waveguide object scattering with the Rayleigh hypothesis

In this paper the plane-wave scattering matrices for a range-dependent seab ed and upper free surface are computed using the Rayleigh hypothesis at the surfaces. These matrices can then be used to compute the pressure field wi thin a waveguide bounded by these surfaces; they can also be easily combine d with the scattering matrix characterizing an object. Computational exampl es are given for range-dependent acousto-elastic waveguides and the fields compared with those computed by other methods. An example with a steel cyli nder in the waveguide is also shown. (C) 1999 Acoustical Society of America . [S0001-4966(99)04407-0].