Filter
Top Products
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 is synonymous for T ratings. 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.
SAFETY
90
SAFETY
For information about hearing aids and
digital wireless phones
FCC Hearing Aid Compatibility and Volume
Control
http://www.fcc.gov/cgb/dro/hearing.html
Gallaudet University, RERC
http://tap.Gallaudet.edu/DigWireless.KS/DigWirele
ss.htm
Hearing Loss Association of America [HLAA]
http://www.hearingloss.org/learn/cellphonetech.asp
The Hearing Aid Compatibility FCC Order
http://hraunfoss.fcc.gov/edocs_public/attachmatch
/FCC-03-168A1.pdf
AX275_Eng_new.qxd 3/13/07 5:55 PM Page 90