an acoustic damper provided in said tube, said tube connecting said {TAIL ~ pressure detector} to said combustion chamber with {HEAD ~ said intake tap} 
an acoustic damper provided in said tube , said tube connecting said { TAIL ~ pressure detector } to said combustion chamber with { HEAD ~ said intake tap }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD