alt Hacker NewsIt actually can! Since the RF can see inside your mouth the system doesn't inherently need lip movements and can be fine tuned on what we call "internal speech". Note that this isn't the automatic tongue movements that occur when "thinking" words to yourself, but it's rather like mouthing with your lips closed. We don't often lead with this since it's weird for many people to do, but with a bit of practice, we have been able to get it down pretty well.
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I've been trying to manifest a product like this for a year or two, ever since I really learned what silent speech was (related, but a different speech inference method - the other month I read a paper about using cracks in a graphene nanomesh to deduce words[0]) - this sounds awesome! However, like another commenter[1] said, the glasses are where you lose people IMO. Consider a chic necklace or choker? :-)
Wow that's fascinating. I've added that bit to your text above - I hope that's ok! It answers what was emerging as a sort of mini-FAQ.
Edit: the more that I think about it the cooler and more important this feature seems!