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Regulatory Notices
4B. Regulatory Notices 177
Important Note
Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. End
users must follow the specific operating instructions for satisfying RF exposure compliance. To maintain
compliance with FCC RF exposure compliance requirements, please follow operation instruction as
documented in this manual.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter,
except the transmitters built-in with the device.
FCC Hearing-Aid Compatibility (HAC) Regulations for Wireless Devices
On July 10, 2003, the U.S. Federal Communications Commission (FCC) Report and Order in WT Docket 01-
309 modified the exception of wireless phones under the Hearing Aid Compatibility Act of 1988 (HAC Act) to
require digital wireless phones be compatible with hearing-aids. The intent of the HAC Act 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 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 rated. M4 is the better/higher of the two ratings. Your HTC EVO™ 4G
is rated M3.
T-Ratings: Phones rated T3 or T4 meet FCC requirements and are likely to be more usable with a hearing
aid’s telecoil than phones that are not rated. T4 is the better/higher of the two ratings. Your HTC EVO™ 4G is
rated T3.
Please power off the Bluetooth function while using hearing aid devices with your HTC EVO™ 4G.
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 better use. A sum of 8 is considered for best use. In
the above example, 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 is acceptable for normal operation.
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.