TeleEpoch Limited U671C Manual Do Utilizador

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:

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

Gallaudet University, RERC:

https://fjallfoss.fcc.gov/oetcf/eas/reports/GenericSearch.cfm