Instruction Manual

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humming, or whining noise. Some hearing
devices are more immune than others to this
interference noise, and phones also vary in the
amount of interference they generate.
The wireless telephone industry has developed
a rating system for wireless phones, to assist
hearing device users nd 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 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 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 nd this rating.
Higher ratings mean that the hearing device
is relatively immune to interference noise.