Quote:
Originally Posted by Bruno
What's the range for long grass rustling, concealing a cave lion? :D Or deer, or rabbit. I suspect this is a survival thing.
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I think human babies often squeal in the range, and/or many smaller primates' alarm calls fit. So it could just be an ancient hold over as it's mostly structural amplification rather than more easily adjustable sensitivity.
What's really interesting is how chimps' range goes to 40 kHz, twice ours, but their tonal discrimination is around half ours. It's almost like we doubled down on lower pitches.