Identification is outlined in the figure below and can be summarized as follows: (currently, it is limited to making the call that the object is a target of interest, an indication of its size (small, large) and using response to confirm it is anthropogenic, based on symmetry properties).

UXO search systems using acoustic methods is a “good news bad news” situation: the good news is the ability to investigate relatively large areas with broadband acoustic sensors; the bad news is when you do that, you have created an enormous amount of data to analyze and interpret. In turn, to do that well, requires extremely precise geolocation of sources and receivers, and confidence that the sources and receivers are stable and repeatable.