If the detected number shock events falls below the lower event threshold , then {HEAD ~ the shock threshold} for the shock detector is decreased in {TAIL ~ order} to increase the sensitivity of the shock detector 
is decreased in
If the detected number shock events falls below the lower event threshold , then { HEAD ~ the shock threshold } for the shock detector is decreased in { TAIL ~ order } to increase the sensitivity of the shock detector
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH