User's Manual

55
FDA Information
Some hearing instrument users have reported a buzzing
sound in their hearing instrument when they are using
mobile phones, indicating that the mobile phone and
hearing instrument may not be compatible. According
to the ANSI C63.19 standard (ANSI C63.19-2007
American National Standard Methods of Measurement
of Compatibility Between Wireless Communications
Devices and Hearing Aids), the compatibility of a
particular hearing instrument and mobile phone can be
predicted by adding the rating for the hearing instrument
immunity to the rating for the mobile phone emissions.
For example, the sum of a hearing instrument rating of 2
(M2/T2) and a telephone rating of 3 (M3/T3) would result
in a combined rating that equals at least 5 would provide
“normal use”; a combined rating of 6 or greater would
indicate “excellent performance”. See the Product Card
included with your hearing aid for the exact M/T rating of
your hearing instrument.
Important Notice for Prospective
Sound Generator Users
Good health practice requires that a person with tinnitus
have a medical evaluation by a licensed physician
(preferably a physician who specializes in diseases of the
ear) before using a sound generator. Licensed physicians
who specialize in diseases of the ear are often referred to
as otolaryngologists, otologists or otorhinolaryngologists.
The purpose of a medical evaluation is to assure that all
medically treatable conditions that may affect tinnitus
are identified and treated before the sound generator
instrument is used.