But when he rigged the truck's bell to sound more like a jazz cymbal, he wound up making more money that summer than he'd made teaching for nine months.

FORBES: Balancing Act

Pavlov's early experiments on reflexes trained dogs to salivate at the sound of a bell, by ringing one every time they were fed with meat.

ECONOMIST: Robomoths | The

"Sir Stuart Bell combined great expertise with sound judgment, " he said.

BBC: Middlesbrough MP Sir Stuart Bell dies, aged 74

Blankfein and Jamie Dimon of JPMorgan Chase ( JPM) have recently taken to the public to sound the alarm bell on the cliff and investors should listen.

FORBES: Goldman Sachs Can Fall Off the Fiscal Cliff

Unless you've changed the default settings on your email, you are treated to a pop-up message, the sound of a bell, or a counter that signals your growing number of unread messages.

CNN: A New Year's resolution for the workplace

Just as Pavlov's dog learned to associate the sound of a bell ringing with dinnertime, rats can learn to associate flashes of light with how long they must wait to receive a sip of water.

MSN: Goggle-wearing rats show link between learning, rewards

Not surprisingly, Burns wobbled on a few occasions after that first-round setback, but the sound of the bell, his fans and years of experience kept him in the fight as the tenacious, menacing Martinez looked for the knockout.

BBC: Incomparable drama in Glasgow on Burns' night

Three years ago, a bell tuning expert analysed five parts of its sound and it failed all the tests.

BBC: Bristol

Does that sound--does that ring a bell?

CNN: Transcripts from video deposition of Lewinsky, Jordan, and Blumenthal