cell phone
compatibility
7
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.
8
adjusting the
volume
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.”
In order to increase or decrease the volume of
your hearing aid, it is equipped with a volume
control. To change the volume level, use the
tip of your finger to rotate the volume wheel.
The volume control is numbered from 1-4,
with 1 being the lowest setting and 4 being
the highest setting. To increase the volume
level, rotate the volume wheel upward toward
the number 4, and to decrease the volume,
rotate the wheel downward.
As you adjust the volume control, you may
hear a whistling noise, which is called
feedback. This is caused by amplified sound
bouncing off your hand back into the
instrument. The whistle should end when
you take your hand away.
