Study: Caffeine may make you hear things

June 6, 2011 10:00:00 PM PDT
If you drink more than five cups of coffee a day, you might be hearing things.

A study by an australian university suggests people's ears play tricks on them when they drink too much coffee.

Researchers looked at a group of volunteers who were told to consume high levels of caffeine and listen to a white noise machine.

Volunteers were told a song would play in the background, and if they heard it, they should press a button.

The song never actually played, but several people actually thought they heard it.

Researchers say five cups of coffee a day is enough to trigger the same effect.