{TAIL ~ A hearing aid apparatus} employs a single side band modulator which serves to convert an audio band of frequencies into {HEAD ~ an upper and lower side band signal} 
{ TAIL ~ A hearing aid apparatus } employs a single side band modulator which serves to convert an audio band of frequencies into { HEAD ~ an upper and lower side band signal }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD