Verykool s757 User Manual
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User Manual
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.
S757 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.
S757 is rated T3.
Please power off the Bluetooth function while using hearing aid devices with your S757.
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.
Safety and regulatory guide
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. This methodology applies equally for T ratings. 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.
For information about hearing aids and digital wireless phones,
FCC Hearing Aid Compatibility and Volume Control:
Gallaudet University, RERC:
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