We investigate, for purposes of remote sensing, the spherically backscattered spectra of acoustic realizations of localized wave solutions to the homogeneous wave equation. The solutions represent broadband focused interference patterns whose focusing properties have been demonstrated to be superior to those of equivalent monochromatic (i.e., cw) solutions, in the context of multi-time-derivative transmit-receive systems. The interference patterns are acoustically launched with a synthetic hydrophone array. The backscattered spectra of several different sized steel and aluminum spheres have been obtained. Analysis indicates that the sphere radius can be readily extracted from these spectra.

• Received 25 January 1993

DOI:https://doi.org/10.1103/PhysRevE.48.1410