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Cell phone and hearing instrument

compatibility

Somehearinginstrumentusershavereporteda

buzzingsoundintheirinstrumentswhentheyare

usingcellphones,indicatingthatthecellphone

andhearinginstrumentmaynotbecompatible.

Thecompatibilityofaparticularhearingaidand

cellphonecanbepredictedbyaddingtherating

forthehearingaidimmunitytotheratingforthe

cellphoneemissions(ANSIC63.19-2006American

NationalStandardMethodsofMeasurementof

CompatibilitybetweenWirelessCommunication

DevicesandHearingAids).

Forexample,thesumofahearingaidwitha

ratingof2(M2/T2)andatelephonewitharating

of3(M3/T3)wouldresultinacombinedratingof

5.Accordingtothestandard,anycombinedrating

thatequalsatleast5wouldprovide“normaluse”;

acombinedratingof6orgreaterwouldindicate

“excellentperformance.”

Bernafon CHRONOS 9 User Manual

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