Explication - Opus Technologies LD Serie Manuel D'installation Et D'utilisation

Nom du modèle | Manuel d'installation et d'utilisation | Installation and user manual | 30

6. Explication

Holding and terminating the wire forming the
loop are connected to an audio amplifier. The
hearing aid has a coil often called "T" or "T-coil"
which is placed inside the prosthesis and con-
sists of a wire forming turns. The magnetic field
generated by the large loop will cross the small
loops in the prosthesis and, by the induction
process, the electrical signal present in the large
loop will be found in small. The signal of the au-
dio amplifier is transmitted to the prosthesis,
which will then restore it to the ear of the hea-
ring-impaired.
The loop can be installed at floor or ceiling level,
more precisely between 1.10m and 2.20m from
the listening height (ears).
The presence of an auditory loop is often indi-
cated by a blue logo representing a crossed out
ear and a letter T. Generally, a hearing aid has
two major positions, the M and the T. The posi-
tion M makes it possible to perceive the sound
thanks to sound pressure as a microphone,
while the position T (T for telephone) directly
receives the audio signals transmitted by induc-
tion via the integrated coil. Some prostheses
combine these two modes of operation with the
MT
position. It allows the hearing impaired to per-
ceive both ambient noise and inductively trans-
mitted signals.