[Flyndaran]

I define human echolocation as Scanning Sense: Sonar with hefty limitations.

One thing is that the higher the frequency of emitted sound the better the resolution. So anything detectable by human hearing will have to result in very poor quality but wider "image" arc.

Realistically, I doubt humans could get any even vague sonar like qualities past a dozen feet or so. As well as the obvious "strobe" effect from from slow signal and echo compared to real bat clicking.