What if you could detect the vocalization somehow instead of relying on a very noisy data source (brain signals), which I see becoming a roadblock...subvocaliza

What if you could detect the vocalization somehow instead of relying on a very noisy data source (brain signals), which I see becoming a roadblock...subvocalization would be like being able to chat without typing...you would still be interacting with a UI that will make sure you dont give out your bank card number etc. Maybe even hold up your phone and it will beam some sort of ultrasound or laser to detect tiny movements in the larynx (I have no idea what I'm talking about) but seems like there's patent in the works by physically attaching sensors... https://en.wikipedia.org/wiki/Subvocal_recognition https://en.wikipedia.org/wiki/Subvocal_recognition https://www.youtube.com/watch?v=xyN4ViZ21N0 https://www.youtube.com/watch?v=xyN4ViZ21N0