Study: Caffeine may make you hear things

FRESNO, Calif.

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.

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