Oct. 12, 2012 -- The sound of nails on a chalkboard or screams may send shivers down the spine for a good reason. A new study shows annoying sounds trigger a highly emotional response in the brain.

Teenagers aren't the only people who make annoying speech sounds. You do, too. Everyone does. You probably don't make all of these sounds, but I bet you do at least a couple of them every so often.