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Nails On Chalkboard, Sounds Amplified In Ear Canal And Cause Physical Distress

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Nails On Chalkboard, Sounds Amplified In Ear Canal And Cause Physical Distress

Old 11-07-2011
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Default Nails On Chalkboard, Sounds Amplified In Ear Canal And Cause Physical Distress



Most of us can't bear the sound of nails on a chalkboard (shudder), but now, researchers have a possible explanation as to why the sound makes us cringe and cover our ears.

It turns out our adverse reaction to the piercing sound is partly physical and partly psychological, and that the part of the noise that makes us wince has a frequency between 2,000 and 4,000 Hz (hertz), a range naturally amplified by the shape of our ear canals, Wired Science explains.

Researchers from the Macromedia University for Media and Communication in Germany and the University of Vienna worked together to get to the bottom of the sound's bad rep.

They exposed participants to the sound of nails on a chalkboard as well as similar sounds, such as a fork scraping a plate and Styrofoam squeak, according to ScienceNow.

Read more: http://www.huffingtonpost.com/2011/1...healthy-living
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Old 11-07-2011
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Doesn't bother me.
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Old 11-07-2011
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That noise sets my teeth on edge and makes the hair on the back of my neck stand up!
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