For a hearing aid with both acoustic coupling and telecoil
coupling with a rating of M4/T2 and with a telephone
rating of M3/T3, the combined rating is 7 (M4 + M3) for
the acoustic coupling and 5 (T2 + T3) for the telecoil
coupling. According to the guideline given above, both
types of coupling will thereby be acceptable, with the
acoustic coupling indicating excellent performance and
the telecoil coupling indicating normal use. The above
equipment performance measurements, categories and
system classifications are based upon the best
information available, but it cannot be guaranteed that
all users will be satisfied.
The immunity of all Sonic hearing instrument models
covered by these instructions for use is at least M2.
Important Notice
The performance of individual hearing instruments
may vary with individual cell phones. Therefore, please
try this hearing instrument with your mobile phone or,
if you are purchasing a new phone, be sure to try it
with your hearing instrument 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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