LG VP200 User Manual page 18

is to ensure reasonable access to telecommunications services for persons with hearing disabilities.
While 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 a rating system for wireless phones, to assist 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 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 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 to the left, 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 using their hearing aid
with the particular wireless phone. "Normal usage" in this context is defined as a signal quality that's
acceptable for normal operation. The M mark is intended to be synonymous with the U mark. The T mark
is intended to be synonymous with the UT mark. The M and T marks are recommended by the Alliance
for Telecommunications Industries Solutions (ATIS). The U and UT marks are referenced in Section
20.19 of the FCC Rules. The HAC rating and measurement procedure are described in the American
National Standards Institute (ANSI) C63.19 standard. When you're talking on a cell phone,
it's recommended that you turn the BT (Bluetooth) mode off for HAC.
For information about hearing aids and digital wireless phones
Wireless Phones and Hearing Aid Accessibility
http://www.accesswireless.org/hearingaid/
FCC Hearing Aid Compatibility and Volume Control
http://www.fcc.gov/cgb/consumerfacts/hac_wireless.html
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