Fcc id bcg e2816a11/2/2023 Cell phones using inductive coupling technology are tested for telecoil coupling capability according to the ANSI C63.19 standard. Those that are considered passing (those with a rating of "good" or "excellent") for use with hearing aids set in microphone mode are assigned a rating of M3 or M4. Cell phones using acoustic coupling technology are tested for reduced RF emissions according to the ANSI C63.19 standard. Cell phones are rated according to their hearing aid compatibility in terms of RF transmissions or telecoiling coupling capability.
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