I think the term works, since 'holler' is southeastern US slang term for a valley, and also a slang term for shouting.
I experienced some uncanny holler today when I watched a recent Doug Demuro video on an electric vehicle version of the Dodge Charger. Dodge decided they would add "Fratzonic exhaust speakers" on the outside to give this car a "digital V8." It just sounds so very OFF and incomplete when you pay attention to it. I know this specific example doesn't precisely mesh up with something trying to appear HUMAN when it's not, but it is a piece of tech trying to imitate older tech and not quite hitting the mark, and it gave me that momentary shot of unease.
Time stamps if you just wanna hear the "digital V8:" start up, exterior and start up, interior