You have a mouth with a bunch of tissue in it and manipulate your tongue, lips, throat, and other pieces so that somehow words come out. A lot of variables figure in, which can make the whole process of talking a complex process. Neil Thapen makes it more understandable with a fun simulator he calls Pink Trombone. Turn your sound on, and click and drag any of the words to see how voice changes when you modulate parts of the mouth.
Simulation shows how your mouth works when you talk
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