  We present numerical and analytical results for the reflection and
transmission properties of matter wave solitons impinging on localized
scattering potentials in one spatial dimension. Our mean field analysis
identifies regimes where the solitons behave more like waves or more like
particles as a result of the interplay between the dispersive wave propagation
and the attractive interactions between the atoms. For a bright soliton
propagating together with a dark soliton void in a two-species Bose-Einstein
condensate of atoms with repulsive interactions, we find different reflection
and transmission properties of the dark and the bright components.
