That is, when it's not used for echolocation. When we arrive at more scientific definition of "neuroplasticity" (or whatever the underlying effect is called) this will be the one of examples.

https://en.wikipedia.org/wiki/Human_echolocation

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3102086/

PS: There's also great episode of Radiolab on that topic.

http://www.npr.org/sections/13.7/2013/01/28/170355712/be-lik...