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