It's an "adlet," if that helps.
Homer Simpson's unmistakable "D'oh!" or "Woohoo!" followed by the familiar tagline, "Tonight on Fox!" for example, has been a popular two-second ad -- known as a blink -- for Fox Broadcasting.
"We love the blinks and adlets. They are great frequency builders, especially when you have iconic sounds associated with shows," said Kaye Bentley, senior vice president with News Corp.'s Fox Broadcasting.