LG E960 - Understanding M-Ratings

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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labeled.
M4isthebetter/higherofthetworatings.

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denedasasignalqualitythat’s
acceptablefornormaloperation.
FCC Hearing-Aid Compatibility
(HAC) Regulations for Wireless
Devices
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.
ToenterthattheHearingAid
Compatibilityratingforyourphoneis
maintained,secondarytransmitterssuch
asBluetoothandWLAN(thisphonedoes
nothaveWLAN)componentsmustbe
disabledduringacall.Seepage118for
instructionstodisablethesecomponents.