Can blind people develop radar-like senses through echolocation?

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Regarding human echo location, there was a scifi tale about a society who had to live underground after a disaster(nuke war) and tale depicted them evovling to use "clickstones" which they used to "click" together(one handed) and find their way around in dark tunnels. Eventually the hero found his way out into the light and all was good. Can't imagine what a communal gathering would have "sounded " like. Don't know how they distinguished one click from another.
 
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profbuxton said:
Can't imagine what a communal gathering would have "sounded " like. Don't know how they distinguished one click from another.
I don't think that would be nearly as hard as you expect.

It might seem like a jumble to the untrained ear, but
1] every pair of rocks will be different sizes, and your clicks will have a unique signature,
2] you're expecting your clicks, they will be an immediate extension of your own click: Like Click-ick-ck-k.
3] I don't imagine they are clicking every second. Perfect overlaps would not be as common as all that.
4] if you're in a communal setting, you don't need to check for obstructions much. You'll know where other people are, and they won't be inside walls.