  In this paper, we show the RCS enhancement due to the acoustic disturbances
around a pulsating sphere. The acoustic variation is modeled with the
dielectric inhomogeneities around the sphere caused by the pressure
fluctuations due to the acoustic source. RCS is computed for the modeled
dielectric pulsating sphere, a cube, and a cone on a cylinder across a
frequency band using Finite Difference Time Domain (FDTD) method. The RCS of
the pulsating sphere and other objects considered are dominated by the
background scattering from the pulsating object. In this work, we show that the
dielectric variation due to the acoustic source can be detected even if there
is no scattering from the object. The scattering from the dielectric variation
leads to the detection of Bragg scattering along with a significant increase in
RCS.
