For example, you can model a pure sine wave with the equation ... Most people describe it as sounding like Donald Duck. Listen at about the 20 second mark of this mp3 file and just after that ...

Select rooms at the Disney Ambassador Hotel in Tokyo Disney Resort have been decked out with decor for Donald’s Quacky Duck! Duck! Duck City!

Donald Duck debuted in “The Wise Little Hen” on ... Around him are various black and white sketches of him with notes and a Character Model Dep’t. stamp. “Since 1934” is in gray letters ...