How do we talk? And how do we sing? Most of us walk around making sound all day without any real idea of how we do it. We'll speak with vocologist Ingo Titze about how the human voice sings, the parts of a human singing voice, and more. We'll also speak with Tecumseh Fitch about why we talk... but monkeys don't. The reason? They've got the voice, but not the brains. We've even got some creepy recordings. Related links: Ingo's tips for tired voices: grab a straw! A reflex resonance model of vocal vibrato in The Journal of the Acoustical...