However, in a preferred embodiment of the invention, the method is adapted for processing {HEAD ~ an audio signal} in {TAIL ~ a listening device} 
in
However , in a preferred embodiment of the invention , the method is adapted for processing { HEAD ~ an audio signal } in { TAIL ~ a listening device }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL