The output audio signal is then applied to a compressor amplifier circuit for application to {HEAD ~ the ear} of {TAIL ~ a handicapped user} 
of
The output audio signal is then applied to a compressor amplifier circuit for application to { HEAD ~ the ear } of { TAIL ~ a handicapped user }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL