Silent Speech
From: NASA Tech Briefs - 07/2016 - page 8

An alternative way of communicating developed at Ames Research center is
based on the direct interpretation of nervous system control signals sent to
speech muscles by the brain. The method interprets non-invasive aggregate
surface measurements of ElectroMyographic Signals (EMGs) to categorize muscle
activations prior to sound generation. Applications include human-to-machine
commands, physocal- and speech-disabled person, underwater operations, and
medical and emergency service workers.

Links:
Silent Speech
https://technology.nasa.gov/patent/TOP2-131

Extension of the Human Senses
http://www.nasa.gov/centers/ames/research/technology-onepagers/human_senses.html

Silent Speech: How To "Read Thoughts" with SVR
http://artificialtelepathy.blogspot.com/2009/01/silent-speech-how-to-read-thoughts.html

Subvocal Speech Demo
http://www.nasa.gov/centers/ames/news/releases/2004/subvocal/subvocal.html

Wireless neckband allows first voiceless phone call (video 3:26)
https://www.youtube.com/watch?v=xyN4ViZ21N0

Nerve-tapping neckband used in ‘telepathic’ chat
https://www.newscientist.com/article/dn13449-nerve-tapping-neckband-used-in-telepathic-chat

The Silent Speaker
http://www.forbes.com/free_forbes/2006/0410/084.html

Not related:
Thinking of words can guide your wheelchair
https://www.newscientist.com/article/dn12602-thinking-of-words-can-guide-your-wheelchair