  It is shown that the turbulent flow of acoustic waves propagating outward
from the inner edge of the disk causes the accretion of the matter onto the
center. The exponential amplification of waves takes place in the resonance
region, $ \omega = (n\pm 1)\Omega $. Here $ \omega $ is the frequency of the
acoustic wave, $ n $ is its azimuthal wave number, $ \Omega (r) $ is the
angular frequency of rotation of the disk. The effect is similar to the inverse
Landau damping in a collisionless plasma. Energy comes from the energy of
rotation of the disk. That leads to decrease of the disk angular momentum and
to accretion of the matter. The value of the accretion rate $dM/dt$ is ${\dot
M} = \pi rc_s \Sigma_0 (c_s / v_{\phi 0})^2 W $. Here $ c_s $ is the speed of
sound of the disk gas, $ v_{\phi 0} $ is the Keplerian rotation velocity,
$\Sigma_0 $ is the surface density of the disk, $ W $ is total power of the
acoustic turbulence, $ W \simeq \int_0^\infty d \omega \sum_{n\geq 0} \Big {|}
\frac {\Sigma'} {\Sigma_0} \Big {|}^2 (\omega, n) $, $ |\Sigma'|^2 (\omega, n)
$ is the spectral power of turbulence. The presented picture of accretion is
consistent with the observed variations of X-ray and optical radiation from
objects whose activity is associated with accretion of gas onto them.
