The problem I&#x27;ve always had with audio interfaces is that input is not private. Requests on public transportation are heard by many. Requests at home turn into a conversation with the roommate, spouse, or children. Requests walking down the street make others question the mental wellbeing of the person talking to him&#x2F;herself.<p>I&#x27;m reminded of the Ender&#x27;s Game sequels in which the protagonist wears a small earpiece with an AI named Jane. He communicates with Jane by &quot;subvocalizing&quot; -- mentally saying the words, physically barely uttering a sound. The AI understands.<p>A few years ago there was a TED talk (forgive me; unable to find the link) on which a technology was demoed to do something similar. Sensors placed around the throat, combined with EEG sensors around the temple, allowed a man to transmit text to a computer by following all the mental and muscle processes of speaking, stopping short of moving his lips in an obvious fashion or making sounds. The sensors allowed the computer to translate their input to actual words.<p>Perfecting and miniaturizing that technology, then combining it with an in-ear AI, would be a game changer.