The espionage potential of many of the technologies in the In-Q-Tel portfolio are immediately apparent, but there are some surprises, like Sonitus Medical, which makes hearing aids that fit over the teeth and send sounds directly to the inner ear.

FORBES: Business In The Beltway

Several weeks later, although hearing sensitivity had recovered to normal levels, activity in the auditory nerve connecting the inner ear to the brain remained impaired.

BBC: Viewpoint: Does deafness contribute to dementia?