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34 Using Your BlackBerry® 8830
Using Your BlackBerry® 8830 With a Hearing Aid Device
Your BlackBerry® device has been tested for hearing aid device compatibility.
When some wireless devices 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 wireless devices also vary in the amount of interference they generate.
The wireless telephone industry has developed ratings for some of their wireless
devices, to assist hearing device users in finding wireless devices that may be
compatible with their hearing devices. Not all wireless devices have been rated.
Wireless devices that have been rated have a label located on the box. Yo u r
BlackBerry® 8830 World Edition smartphone has an M4/T4 rating.
These ratings are not guarantees. Results will vary depending on the level of
immunity of your hearing device and degree of your hearing loss. If your hearing
device happens to be vulnerable to interference, you may not be able to use a
rated wireless device successfully. Trying out the wireless device with your
hearing device is the best way to evaluate it for your personal needs.
M-Ratings: Wireless devices rated M3 or M4 meet FCC requirements and are likely
to generate less interference to hearing devices than wireless devices that are not
labeled. M4 is the better/higher of the two ratings.
T-Ratings: Wireless devices 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 wireless devices. T4 is the better/higher of the two ratings. (Note
that not all hearing devices have telecoils in them.)
The more immune your hearing aid device is, the less likely you are to experience
interference noise from your wireless device. Hearing aid devices should have
ratings similar to wireless devices. Ask your hearing healthcare professional for