[en] The dc acoustoelectric current J^ac induced by the interaction of acoustic phonons with the conducting electrons is calculated. The calculation is done in the hypersound regime where ql >> 1 (here q is the acoustic phonon number and l is the electron mean free path). The electric field consists of dc field E₀ and a low frequency alternating field E₁. A nonlinear dependence of J^ac on E₀ and E₁ is observed. Depending on the direction of the dc field E₀ the acoustoelectric current can either be positive or negative. At ω_q = 10¹¹sec^-1 and in the absence of E₀, J^ac is very small and tends to zero at E₁ = 1.3 x 10⁵V_m - 1. Further increase of ω_q from 10¹¹sec^-1 sees a dramatic shoot 'up' of J^ac. Lastly the acoustoelectric current in the presence of E₀ is modulated by E₁. (author)