SONNET audio processor
19
COIL
The coil connects the SONNET audio processor with the implant. It sends both energy and
the coded audio signal through the skin to the implant. A small magnet is located in the
centre of the coil to hold it in place on the head over the implant. The magnet can be
changed to adjust the magnet strength to your needs. The magnet strength chosen should
be appropriate for the individual patient, that is strong magnets are not recommended for
patients with thin skin flaps (e.g. young children or very slim patients), as excessive magnetic
attraction could potentially increase the likelihood of skin irritation.
The SONNET audio processor can be used with the MED-EL D Coil, it cannot be used with the
previous generation COMT+/COMT+ P coils.
Fig. 9 Coil (D Coil)
IMPORTANT
Depending on the type of implant, two variants of magnets (i.e. magnet inserts) are available
for the D Coil. These two variants differ in magnet polarisation. The type of implant is stated
on your Patient Identification Card.
For patients implanted with a SYNCHRONY implant, the magnet insert
must contain triangles as shown in Fig. 11.
For patients implanted with any other type of implant (CONCERTO,
SONATAti
100
, etc. ), the magnet insert must contain circles as shown in
Fig. 12.
It is essential that, based on the type of implant, the correct variant of magnet is used! If
the wrong variant of magnet is inserted, the coil may still be held in place over the implant.
However, due to different polarisation of the magnets, a slight dislocation between the
implant and coil will occur which may result in improper communications between implant
and coil.
