- echolocation in blind humans https://en.wikipedia.org/wiki/Human_echolocation
- sight through signals sent on tongue https://www.scientificamerican.com/article/device-lets-blind...
In the latter case, I recall reading the people involved ended up perceiving these signals as a "first order" sense (not consciously treated information, but on an intuitive level like hearing or vision).
- echolocation in blind humans https://en.wikipedia.org/wiki/Human_echolocation
- sight through signals sent on tongue https://www.scientificamerican.com/article/device-lets-blind...
In the latter case, I recall reading the people involved ended up perceiving these signals as a "first order" sense (not consciously treated information, but on an intuitive level like hearing or vision).