You know the sound: It's eerie and echoing, and it makes the little hairs on your arms stand up immediately. So many horror movies use it to create a chilling atmosphere, and even some reality shows ...

It's a common swimming pool game: Force a buoyant ball underwater and let it go. The ball springs to the surface and jumps into the air. But, submerge the ball deeper underwater and the effect is ...

You don't even have to be looking at the screen to know an episode of the "Law & Order" franchise has just started or transitioned to a new scene. All you have to do is hear the iconic sound: dun-dun.