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(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 under clear plate (see page 7 for
location).
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 aids
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 particular
hearing aids and a 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 4 (M4) and
a telephone rating of 3 (M3) would result in a
combined rating of 7. 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 these hearing aids is at
least M4. The equipment performance
measurements, categories and system
classifications are based upon the best
information available but cannot guarantee
that all users will be satisfied.
The performance of the individual hearing
aids may vary with individual mobile phones.
Therefore, please try these hearing aids with
your mobile phone or, if you are purchasing a
new phone, please be sure to try it with your
hearing aids prior to purchase.