Dysfunction in hearing
instruments
● Hearing instruments may stop
functioning, for instance if the
batteries have expired or if the
tubing is blocked by moisture or
earwax. You should be aware of
this possibility, in particular
when you are in traffic or other-
wise dependent on warning
sounds.
Interference
● Your hearing instrument has
been thoroughly tested for inter-
ference, according to the most
stringent international stan-
dards. But new technical devel-
opments constantly bring new
products into society, and some
may emit electromagnetic
radiation, leading to unforeseen
interference in hearing instru-
ments. Examples include
induction cooking appliances,
shop alarm systems, mobile
telephones, fax machines,
personal computer devices etc.
Possible side effects
● Hearing instruments may cause
an accelerated accumulation of
cerumen (ear wax).
● The otherwise non-allergenic
materials used in hearing instru-
ments may in rare cases cause a
skin irritation.
Consult a doctor if you experience
any of these side effects.
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