Human click-based echolocation: Effects of blindness and age, and real-life implications in a 10-week training program https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8171922/
Human echolocation lets blind man 'see' (CNN video) https://www.youtube.com/watch?v=WHYCs8xtzUI
Human echolocation - Wikipedia https://en.wikipedia.org/wiki/Human_echolocation