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 otherwise dependent on warning sounds.
Interference
• Your hearing instrument has been thoroughly tested for interference, according to the
most stringent international standards. But new technical developments constantly
bring new products into society, and some may emit electromagnetic radiation, leading
to unforeseen interference in hearing instruments. Examples include induction
cooking appliances, shop alarm systems, mobile telephones, fax machines, personal
computer devices, X-rays, Computer tomography etc.
• Your hearing instruments are designed to comply with the most stringent Standards of
International Electromagnetic Compatibility. However, hearing instruments may cause
interference with other medical devices. Such interference can also be caused by radio
signals, power line disturbances, airport metal detectors, electromagnetic fields from
other medical devcies and eletrostatic discharges.
Possible side effects
• Hearing instruments may cause an accelerated accumulation of cerumen (ear wax).
• The otherwise non-allergenic materials used in hearing instruments may in rare cases
cause a skin irritation.
Consult a doctor if you experience any of these side effects.
