Horizontal refraction Acoustic fields 2 Acoustic propagation 2 Threedimensional (3-d) 2 Wave transmission 2 article 2 sound 2 3D solutions 1 Adiabatic approximations 1 Boundary interactions 1 Broadband transmission 1 Columbia river estuaries 1 Computerized tomography 1 Diffraction of sounds 1 Dispersion (waves) 1 Estuaries 1 Geoacoustic parameters 1 Inhomogeneities 1 Modal dispersion 1 Modeling and measurement 1 Naval architecture 1 Normal modes 1 Parabolic Equations 1 Positive bias 1 Refraction 1 Sea ice 1 Seafloor bathymetry 1 Solvable model 1 Transmission loss 1 Travel time 1