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Fingernails GRATING on a chalkboard...

x011 at ns1.CC.Lehigh.EDU x011 at ns1.CC.Lehigh.EDU
Fri Dec 9 12:27:03 EST 1994

In article <Jk5U2Cx.greystroke at delphi.com>, greystroke at delphi.com writes:
>I hope this is the appropriate message base...
>Anyways, on to the question...Being a high school student, I can't help but
>notice the severe irritation caused in some people by that nasty sound of a
>teacher's fingernails accidently screeching accross a chalkboard.  Though
>I know some people are merely annoyed by the sound, others, such as myself
>absolutely cannot tolerate the noise.  Hearing it makes me cringe; I want
>to flee from the sound and attack the person making the sound at the same
>moment.  Others experience the same sensation.  WHY does such a sound
>cause so much anger and irritation in many people.  I cannot understand
>why it does so, considering the noise is not physically painful.  I have
>checked with people from other countries (Ukraine, Russia, China, Spain, and
>Japan), and the effect is the same there.  Since this is not something that
>we have shared with other cultures mediawise, I assume that it must be
>Anyone have any answers?
According to evolutionary theory the screech is similar to the distress
call of monkeys.  We may still be neurological wired as a biological
predispositon that alerts us to this sound.

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