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Mobile phone
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 aid and mobile phone can
be predicted by adding the rating for the hearing aid immunity to the rating for the
mobile 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”.
IMPORTANT NOTICE
The performance of individual hearing instruments may vary with individual mobile
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
your purchase. For additional guidance, please ask your mobile phone provider for the
booklet entitled “Hearing Aid Compatibility with Digital Wireless Mobil Phones.”
The immunity of this hearing instrument depend on the type of speaker, see be below
table.
M T
RITE 60
M2 T4
RITE 85
M4 T4
RITE 100
M3 T4
The equipment performance measurements, categories and system classications are
based upon the best information available but cannot guarantee that all users will be
satised.
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