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cell phone
“Some hearing instrument users have reported a buzzing sound in their hearing instruments
when they are using cell phones, indicating that the cell 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 cell phone can be predicted by adding the rating for the hearing
instrument immunity to the rating for the cell 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 cell
phones. Therefore, please try this hearing instrument with your cell 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 instrument Compatibility with Digital Wireless Cell Phones.”
