this was a really interesting read. when I opened the post I thought it was gonna be a copy paste from a wiki or something but it was really interesting to read. I already knew a good bit of what you wrote about echolocation but I didn't know that a human could do something similair, thanks for teaching me something new :)
Thank you for your sincere reply. I too was surprised the first time I read about the human part of echolocation. The science of things gets more interesting as the day goes by.