Using quasi-holographic backpropagation to understand high-frequency scattering from curved elastic objects in water

High-frequency scattering from elastic objects in water can include significant contributions from structural guided waves. Those contributions can appear to be radiated from virtual sources within the structure. Quasi-holographic backpropagation (QHBP) limited to supersonic wave numbers can reveal the location in space and time of the virtual sources of scattered sound [Baik, Dudley, and Marston, J. Acoust. Soc. Am. 130, 3838-3851 (2011)]. Using this technique, the scatter signals of interest c