User's Manual

67
hearing device users to find phones that may be
compatible with their hearing devices. Not all phones
have been rated. Phones that are rated have the rating
on their box or a label located on the box. The ratings are
not guarantees. Results will vary depending on the user's
hearing device and hearing loss. If your hearing device
happens to be vulnerable to 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 this.
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 labeled. M4
is the better/higher of the two ratings.
T-Ratings: Phones rated T3 or T4 meet FCC
requirements and are likely to generate less interference
to hearing devices than phones that are not labeled. T4
is the better/ higher of the two ratings.
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. 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 best use.
In the example illustrated above, if a hearing aid meets
the M2 level rating and the wireless phone meets the M3