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