RED Hydrogen One User Manual page 51

This device HAC rating is M4 T3.
The Federal Communications Commission of the United States requires that all wireless mobile devices are compatible with hearing aids and other assisted
listening devices.
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 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 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.
Hearing devices may also be measured for immunity to this type of interference. Your hearing device manufacturer or hearing health professional may help you
find results for your hearing device. The more immune your hearing aid is, the less likely you are to experience interference noise from mobile devices.
The HAC rating and measurement procedure are described in the American National Standards Institute (ANSI) C63.19 standard.
For more information about the FCC Hearing Aid Compatibility please go to http://transition.fcc.gov/cgb/dro/hearing.html.
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