I'm wondering about the history and cultural influence of repeating what someone says in a mocking tone. Do different cultures alter their voices in different ways to indicate that they think what they're saying is stupid/ironic? Are there common features to this tone of voice? When I do this I find myself wobbling my head side-to-side, frowning, and bending many of my speech sounds by pushing the middle of my tongue more toward the roof of my mouth (like the "e" in "meow"). I'm sorry if this doesn't make sense, it's hard for me to articulate since I don't have the technical language. This tone, at least how I've heard it in the northwestern US, is fairly distinct from sarcasm