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Exactly, cats have an extremely wide range of frequencies they can both create and hear, if they are vocalizing at all

They almost all independently chose to pick the signature one we associate with cats, just for us

It has a lot to do with the fact that a cat's meow hits many of the same frequencies as a crying human child.

I’ve read that before, it engages well but I’m not sure they all know what human babies sound like, it just gets a reliable response and other frequencies are either ignored or don’t get then the response they like the most

Yeah, cats don't necessarily know that, they stumble across it by trial and error. We respond to it because we are to some extent hardwired to have our attention grasped by that kind of sound, so we tend to our crying babies.

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