LG LS970 Sprint User Manual page 198

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.
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) or
WLAN mode off for HAC.
For information about hearing aids and digital wireless phones
Wireless Phones and Hearing Aid Accessibility
http://www.accesswireless.org/Home.aspx
FCC Hearing Aid Compatibility and Volume Control
http://www.fcc.gov/cgb/consumerfacts/hac_wireless.html
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