Dysfunction in hearing instruments
• Hearing instruments may stop functioning, for instance if the batteries have expired or
if the receiver/loudspeaker 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 instruments have 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, your hearing instrument 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.
Safety requirements regarding Direct Audio Input (DAI)
• The safety of hearing instruments with DAI (Direct Audio Input) is determined by the
external signal source. When the DAI is connected to mains-operated equipment, this
equipment must comply with IEC-60065, IEC-60601 or equivalent safety standards.
