A throat microphone[1] might work. Another interesting option would be some kind of subvocal recognition device.[2] [1] - https://en.wikipedia.org/wiki/Throat

A throat microphone[1] might work. Another interesting option would be some kind of subvocal recognition device.[2] [1] - https://en.wikipedia.org/wiki/Throat_microphone https://en.wikipedia.org/wiki/Throat_microphone [2] - https://en.wikipedia.org/wiki/Subvocal_recognition https://en.wikipedia.org/wiki/Subvocal_recognition