The sound could be a whistle, a bleep - or any unexpected noise.

BBC: NEWS | Health | Call centre staff 'hearing risk'

"Hilariously, for me, it comes down to the sound of a duck quacking, which is a sound effect that was in my version, used as a bleep noise to cover up an expletive, " Coulton said.

CNN: Singer alleges 'Glee' ripped off his cover song

Well, to quote a recent bestseller, What The Bleep Just Happened, I hear that book is pretty good, by the way.

CENTERFORSECURITYPOLICY: Monica Crowley, Mightier Pen 2012

Producer and microhouse master Matthew Herbert's own attention to detail shows here: Even though "Calculator" is chaotic, each resonant guitar strum and keyboard bleep remains as integral as a decimal place.

NPR: Micachu And The Shapes: Kitchen Sink Music

Company officials say such programs are often on a five-second delay, and censors are on hand to bleep any offensive language.

CNN: STORY HIGHLIGHTS