A machine implemented method of simulating an acoustic received signal arising from {HEAD ~ an acoustic source signal} scattered by {TAIL ~ a target} having a plurality of highlights, the method comprising the unordered steps of: 
scattered by
A machine implemented method of simulating an acoustic received signal arising from { HEAD ~ an acoustic source signal } scattered by { TAIL ~ a target } having a plurality of highlights , the method comprising the unordered steps of :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH