{TAIL ~ The filter system} filters the excursion signal to remove unwanted frequency components from {HEAD ~ the excursion signal} 
{ TAIL ~ The filter system } filters the excursion signal to remove unwanted frequency components from { HEAD ~ the excursion signal }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD