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Safety Guidelines
115
T-Ratings: Phones rated T3 or T4 meet FCC
requirements and are likely to be more usable
with a hearing device’s telecoil (“T Switch” or
“Telephone Switch”) than unrated phones. T4 is
the better/higher of the two ratings. (Note that
not all hearing devices have telecoils in them.)
Hearing devices may also be measured for
immunity to this type of interference. Your
hearing device manufacturer or hearing
health professional may help you find results
for your hearing device. The more immune
your hearing aid is, the less likely you are to
experience interference noise from mobile
phones.
To ensure that the Hearing Aid Compatibility
rating for your phone is maintained, secondary
transmitters such as Bluetooth
®
components
must be disabled during a call.
See Page 82 for instructions to disable these
components.
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