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interference (a buzzing sound) in hearing
aids. If you experience interference from a
mobile phone being used close by, you can
minimize this interference in a number of
ways. Switch your hearing aids to another
program, turn your head in a different
direction or locate the mobile phone and
move away from it.
Labeling
The serial number and year of manufacture are
located inside the battery door.
Mobile phone compatibility rating
Some hearing aid users have reported a
buzzing sound in their hearing aids when
they are using mobile phones, indicating
that the mobile phone and hearing aid may
not be compatible. According to the ANSI
C63.19 standard (ANSI C63.19-2011 American
National Standard Methods of Measurement
of Compatibility Between Wireless
Communications Devices and Hearing Aids),
the compatibility of a particular hearing aid and
mobile phone can be predicted by adding the
rating for the hearing aid immunity to the rating
for the mobile phone emissions. For example,
the sum of the hearing aid rating of 2 (M2/T2)
and a telephone rating of 3 (M3) would result
in a combined rating of 5. Any combined rating
that equals at least 5 would provide “normal
use”; a combined rating of 6 or greater would
indicate “excellent performance.”
The immunity of this hearing aid is at least
M2/T2. The equipment performance
measurements, categories and system
