TeleEpoch Limited U671C 用户手册
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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
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.
mark.
The T mark is intended to be synonymous with the UT
mark. The M and T marks are
mark. The M and T marks are
recommended by the Alliance for Telecommunications
Industries Solutions (ATIS). The U and UT
Industries Solutions (ATIS). The U and UT
marks are referenced in Section 20.19 of the FCC Rules.
The HAC rating and measurement
The HAC rating and measurement
procedure are described in the American National
Standards Institute (ANSI) C63.19 standard. For
Standards Institute (ANSI) C63.19 standard. For
information about hearing aids and digital wireless phones
FCC Hearing Aid Compatibility and
FCC Hearing Aid Compatibility and
Volume Control:
http://www.fcc.gov/cgb/dro/hearing.html
Gallaudet University, RERC:
https://fjallfoss.fcc.gov/oetcf/eas/reports/GenericSearch.cfm