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The Guardian
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Why the sound of fingernails on a chalkboard irks you
CBS News
The mere thought of fingernails scratching a chalkboard can be enough to set some people on edge. Now, a new study may help explain why. Researchers say the shape of the human ear may amplify certain aspects of the sound of fingernails or chalk ...
Screech...Why You Recoil at the Sound of Fingernails on a BlackboardMy Fox Boston
Revealed: Why fingernails down a blackboard sound so awfulDaily Mail
Certain disturbing sounds really do make your arm hairs stand upToronto Star
PhysOrg.com -ABC News (blog) -Huffington Post
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