  We found universal anizopropic spectra of acoustic turbulence with the linear
dispersion law \bbox{$\omega (k) =ck$} within the framework of generalized
kinetic equation which takes into account the finite time of three-wave
interactions. This anisotropic spectra can assume both scale-invariant and non
scale-invariant form. The implications for the evolution of the acoustic
turbulence with non-isotropic pumping are discussed. The main result of the
article is that the spectra of acoustic turbulence tend to become more
isotropic.
