Operation
19
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.”
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