Cell Phone and Hearing Instrument
Compatibility
Some hearing instrument users have reported a
buzzing sound in their devices when they are using
cell phones, indicating that the cell phone and
hearing instrument may not be compatible.
The compatibility of a particular hearing instrument
and cell phone can be predicted by adding the rating
for the hearing instrument immunity to the rating
for the cell phone emissions (ANSI C63.19-2006
American National Standard Methods of Measurement
of Compatibility between Wireless Communication
Devices and Hearing Aids).
For example, the sum of a hearing instrument with
a rating of 2 (M2/T2) and a telephone with a rating
of 3 (M3/T3) would result in a combined rating of 5.
According to the standard, 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 your Pep
hearing instrument is at least M2/T2.
The equipment performance measurements,
categories and system classifications are based
upon the best information available but Sonic
cannot guarantee that all users will be satisfied.
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