  The theory of the acoustics of patchy-saturation in porous media is used to
analyze experimental data on wave velocity and attenuation in partially water
saturated limestones. It is demonstrated that the theory can be used to deduce
the value of V/A, the ratio of the volume to area of the water patch, and l_f,
the Poisson size of the water patch. One can ``hear'' the shape of a patch if
the properties of the rock and the measurement frequencies are such as to
satisfy the specific requirements for the validity of the theory.
