Also: click sonar, blind echolocation
Some blind people navigate by making mouth clicks and listening to echoes.
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Thaler, Arnott and Goodale found that in two blind echolocation experts, listening to click-echoes activated visual (calcarine) cortex, with no echo-related difference in auditory cortex.
As reported in: Thaler, Arnott, Goodale (2011). Neural Correlates of Natural Human Echolocation in Early and Late Blind Echolocation Experts. PLoS ONE. doi:10.1371/journal.pone.0020162
Norman and colleagues trained blind and sighted adults aged 21–79 for 10 weeks; both improved a lot, and blind participants reported better mobility.
As reported in: Norman, Dodsworth, Foresteire et al. (2021). Human click-based echolocation: Effects of blindness and age, and real-life implications in a 10-week training program. PLOS ONE. doi:10.1371/journal.pone.0252330