In other embodiments, {HEAD ~ weighting} of {TAIL ~ the output signals} is obtained by using different surface areas for the sensors or by appropriately positioning two shear mode sensors in relation to the region of influence of the actuator 
In other embodiments , { HEAD ~ weighting } of { TAIL ~ the output signals } is obtained by using different surface areas for the sensors or by appropriately positioning two shear mode sensors in relation to the region of influence of the actuator
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH