User Manual

67
interference, you may not be able to use a rated phone successfully. Trying out the
phone with your hearing device is the best way to evaluate it for your personal needs.
M-Ratings: Phones rated M3 or M4 meet FCC requirements and are likely to generate
less interference to hearing devices than phones that are not rated. M4 is the
better/higher of the two ratings. Your device is rated M3
T-Ratings: Phones rated T3 or T4 meet FCC requirements and are likely to be more
usable with a hearing aid’s telecoil than phones that are not rated. T4 is the
better/higher of the two ratings. Your device is rated T3.
Please power off the Bluetooth function while using hearing aid devices with your
phone.
The hearing aid and wireless phone rating values are then added together. A sum of 5
is considered acceptable for normal use. A sum of 6 is considered for better use. A
sum of 8is considered for best use. In the above example, if a hearing aid meets the
M2 level rating and the wireless phone meets the M3 level rating, the sum of the two
values equal M5. This should provide the hearing aid user with “normal usage” while
Hearing devices may also be rated. Your
hearing device manufacturer or hearing health
professional may help you find this rating.
Higher ratings mean that the hearing device is
relatively immune to interference noise.