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Some hearing aid users have reported a buzzing sound in their
hearing aids when they are using cell phones, indicating that the
cell phone and hearing aid may not be compatible. According
to the ANSI C63.19 standard (ANSI C63.19-2006 American
National Standard Methods of Measurement of Compatibility
Between Wireless Communications Devices and Hearing Aids),
the compatibility of a particular hearing aid and cell phone can
be predicted by adding the rating for the hearing aid immunity to
the rating for the cell phone emissions. For example, the sum of
a hearing aid rating of 2 (M2) 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.”
Immunity of this hearing aid is at least M2. The equipment
performance measurements, categories and system
classifications are based upon the best information available but
cannot guarantee that all users will be satisfied.
NOTE: The performance of individual hearing aids may vary
with individual cell phones. Therefore, please try this hearing
aid with your cell phone or, if you are purchasing a new phone,
be sure to try it with your hearing aid prior to purchase. For
additional guidance, please ask your cell phone provider for
the booklet entitled “Hearing Aid Compatibility with Digital
Wireless Cell Phones.”
