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6 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’s
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.
When you’re talking over the cell phone, it’s recommended you’d turn
the BT (Bluetooth
®
) mode off for HAC.
According to HAC policy (KDB 285076), we state this handset has
not been rated for hearing aid compatibility with respect to the Wi-Fi
capability.