17
Operation
DISCLAIMER – 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/T2) and a telephone rating of 3 (M3/T3) 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 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.”
