The filtered excursion signal may then be subtracted from {HEAD ~ a delayed version} of the original signal to reduce {TAIL ~ the peak} 
The filtered excursion signal may then be subtracted from { HEAD ~ a delayed version } of the original signal to reduce { TAIL ~ the peak }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL