Wireless Coupling to Hearing Technologies - 1194.23(h)
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This is a weird way to say that any type of speaker held up to the ear, because that's what it is, it's a transducer. And I guess it gets pillow mics and things like that, but this has to do with the audio coupling. And this actually is quite important; it wasn't that long ago that manufacturers of hearing aids developed what they call a t-coil. And a t-coil is a coil within the hearing aid that when flipped on will resonate or respond to the coil that is driving the cone, the speaker cone, in the headset. Unfortunately at about the time they developed the t-coil, and it worked real well, a lot of phones came up with new ways and reduced the magnetic connectivity. So, it's not as reliable as it used to be unfortunately, but that's what that means, that magnetic coupling. It's the idea of being able to hear, directly with the hearing aid, exactly what is being put out on the speaker.