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interesting post there, Haplo

Wikipedia has a page about human echolocation

but possibly what is functioning together is the ear sense base and the mind sense base

in other words, it may be the mind creating mental images of the shape of "forms" (such as a tree or house) based on what it hears, in the same way the mind has dreams at night

also, echolocation may also use the body sense base to touch forms, which may assist the mind to create its images of forms & shapes

just a possibility

there are six sense bases, namely, eye, ear, nose, tongue, body and mind so echolocation may function via the ear, body & mind

with metta

element