ReSound Pulse PS60, User Manual

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2. Grasp the sound tube where it bends
and push the dome into your ear
canal. The dome should be placed
far enough into the ear that
the sound tube lies flush with
your head. When the dome is
placed appropriately, you should
not see the sound tube sticking out when you look
directly into a mirror.
3. Position the Sports Lock into the
indentation above the earlobe. If the
device whistles, the most likely reason
is that the dome is not placed correctly
in the ear canal. Other reasons can be
build-up of earwax in the ear canal,
or that the sound tube connection to
the instrument has become loose, in which
case the sound tube must be changed.
It is also possible that the instrument settings are not
optimal. If you have ruled out other reasons for the in-
strument squealing, it is recommended to contact your
hearing care professional.