Cell Phone - oticon Alta IIC Instructions For Use Manual

cell phone

Some hearing aid users have reported a buzzing sound in their hearing aids when they
are using mobile phones, indicating that the mobile phone and hearing aid 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".
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