UTStarcom PN-820 User Manual

Page 271

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269

C

H

10

FCC HEARING-AID COMPATIBILITY (HAC)

REGULATIONS FOR WIRELESS DEVICES

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 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.

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 phone

• FCC Hearing Aid Compatibility and Volume Control

http://www.fcc.gov/cgb/dro/hearing.html

• Gallaudet University, RERC

http://tap.gallaudet.edu/DigWireless.KS/DigWireless.htm

• Self Help for Hard of Hearing People Inc. [SHHH]

www.hearingloss.org/hat/TIPWirelessPhones.htm

• The Hearing Aid Compatibility FCC Order

http://hraunfoss.fcc.gov/edocs_public/attachmatch/

FCC-03-168A1.pdf

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