  We demonstrate a spin to charge current conversion via magnon-phonon coupling
and inverse Edelstein effect on the hybrid device Ni/Cu(Ag)/Bi$_{2}$O$_{3}$.
The generation of spin current ($J_{s}\approx 10^{8}A/m^{2}$) due to magnon -
phonon coupling reveals the viability of acoustic spin pumping as mechanism for
the development of spintronic devices. A full in-plane magnetic field angle
dependence of the power absorption and a combination of longitudinal and
transverse voltage detection reveals the symmetric and asymmetric components of
the inverse Edelstein effect voltage induced by Rayleigh type surface acoustic
waves. While the symmetric components are well studied, asymmetric components
are widely unexplored. We assign the asymmetric contributions to the
interference between longitudinal and shear waves and an anisotropic charge
distribution in our hybrid device.
