The hearing aid 1 further including {HEAD ~ a carrier frequency source} for providing {TAIL ~ a high frequency carrier signal} at an output for application of said signal to both said modulation and demodulating means 
for providing
The hearing aid 1 further including { HEAD ~ a carrier frequency source } for providing { TAIL ~ a high frequency carrier signal } at an output for application of said signal to both said modulation and demodulating means
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH