Study Reveals World’s Most Annoying Sound, And It’s Not Justin Bieber’s Voice

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Kevin Winter / Getty Images

Kevin Winter / Getty Images

Contrary to popular belief, nails on a chalkboard is not the most annoying sound to humans. Justin Bieber’s androgynous vocals didn’t even place in the top 10.

A new scientific study has determined the 10 most annoying sounds to the human brain and why.

Researchers found the part of the brain that regulates emotions, the amygdala, appears to take over the hearing part of the brain when people hear an extremely annoying sound.

“It appears there is something very primitive kicking in,” says researcher Sukhbinder Kumar of the Institute of Neuroscience at Newcastle University in Newcastle upon Tyne, U.K. ”It’s a possible distress signal from the amygdala to the auditory cortex.”

Using functional magnetic resonance imaging (fMRI), researchers looked at activity in the brains of 13 healthy volunteers when they heard a range of 74 different sounds.

The participants rated each sound from most annoying or unpleasant to pleasant.

10. Electric drill

9. Baby crying

8. Squealing brakes on a bicycle

7. Disc Grinder

6. Female scream

For the full story and the top 5 most annoying sounds, read the full story here.

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