Maybe I just dreamed this up, but I seem to recall there used to be a headset thing that you could purchase that had little hearing aid like attachments that worked as microphones. Supposedly, it would record the sound of your "head voice" (the way your voice sounds to you, internally) and then be able to playback for other people what it sounded like.
Yeah, my "head voice" sounds different from my recorded voice. I hate the sound of my voice recorded. I'm always like "Hell no, that's not me. I'm Mr. Suave when I hear my own voice..."
--Christopher