{HEAD ~ The second input transducer} supplies {TAIL ~ an electrical signal} corresponding to the residual noise to the control circuitry to cancel the residual noise 
supplies
{ HEAD ~ The second input transducer } supplies { TAIL ~ an electrical signal } corresponding to the residual noise to the control circuitry to cancel the residual noise
HEAD HEAD HEAD 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