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Tuesday, April 24, 2012

What is it about fingernails on a chalkboard that makes our skin crawl?


Fingernails on a chalkboard is generally considered the most irritating sound out there...

So what makes that so much worse than other sounds? For most of us, the pitch of that hair-curling sound falls right in the human hearing sweet spot. We are particularly sensitive to pitches in that range – and the anatomy of the ear canal actually amplifies them. That’s why one slow abrasive pass of the nails over a slate surface sounds louder and more deafening than your favorite song or live concert, on 11.

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