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mobile phone
“Some hearing instrument users have reported a buzzing sound in their hearing instruments
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 C63.19-2006
American National Standard Methods of Measurement of Compatibility Between Wireless
Communications Devices and Hearing instruments), 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 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 instrument is M4.
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
purchase. For additional guidance, please ask your mobile phone provider for the booklet
entitled “Hearing instrument Compatibility with Digital Wireless Mobile phones.”