ZTE Corporation ZTEC90 Manuale Utente
C90 User manual
18
Use Your Phone with a Hearing Aid Device
Your C90 device is compliant with the FCC Hearing Aid Compatibility (HAC) requirements.
When some wireless phones are used near some hearing devices (hearing aids and cochlear
implants), users may detect a buzzing, 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 ratings for some
of their mobile phones, to assist hearing-device users in finding phones that may be
compatible with their hearing devices. Not all phones have been rated. Phones that have
been rated have a label on the box. Your C90 has been tested for hearing aid device
compatibility and has an M4 and/or T4 rating.
These ratings are not guarantees. Results will vary, depending on the level of immunity of your
hearing device and the degree of your 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 with 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 be
more usable with a hearing device’s telecoil (“T Switch” or “Telephone Switch”) than unrated
phones. T4 is the better/higher of the two ratings. (Note that not all hearing devices contain
telecoils.) The more immune your hearing aid device is, the less likely you are to experience
interference noise from your wireless phone. Hearing aid devices should have ratings similar
to those of phones. Ask your hearing health-care professional for the rating of your hearing
aid.
When some wireless phones are used near some hearing devices (hearing aids and cochlear
implants), users may detect a buzzing, 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 ratings for some
of their mobile phones, to assist hearing-device users in finding phones that may be
compatible with their hearing devices. Not all phones have been rated. Phones that have
been rated have a label on the box. Your C90 has been tested for hearing aid device
compatibility and has an M4 and/or T4 rating.
These ratings are not guarantees. Results will vary, depending on the level of immunity of your
hearing device and the degree of your 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 with 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 be
more usable with a hearing device’s telecoil (“T Switch” or “Telephone Switch”) than unrated
phones. T4 is the better/higher of the two ratings. (Note that not all hearing devices contain
telecoils.) The more immune your hearing aid device is, the less likely you are to experience
interference noise from your wireless phone. Hearing aid devices should have ratings similar
to those of phones. Ask your hearing health-care professional for the rating of your hearing
aid.