{HEAD ~ The excursion signal generator} identifies a peak portion of a signal exceeding a threshold, such as {TAIL ~ a magnitude threshold} 
{ HEAD ~ The excursion signal generator } identifies a peak portion of a signal exceeding a threshold , such as { TAIL ~ a magnitude threshold }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL