Teach yourself to echolocate (2018)

There is a wonderful book about the blind man who was probably one of the earliest innovators in using a cane for echolocation. "A Sense of the World" by Jason Roberts is the story of James Holman, who traveled the world in the early 19th century despite being blind, often being in a great deal of pain, and having limited mobility.

Wow it just struck me that the cane is for echolocation and not just obstacles. I did learn that the blind have keenly adjusted hearing.