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