The actuator signal is configured to cause {HEAD ~ an actuator} to output {TAIL ~ a haptic effect} 
The actuator signal is configured to cause { HEAD ~ an actuator } to output { TAIL ~ a haptic effect }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL