2007-04-27 10:43:02 · 9 answers · asked by Sparky Parker 2 in Science & Mathematics ➔ Biology
(editing to ask, you DID ask about what makes the response, not what makes the sound, yes?)
There's a very interesting evolutionary 'story' behind this one.
A baby's cries have a very similar frequency spectrum to nails on a blackboard. It makes us feel crawly-awful-make-it-stop because we've been so highly selected to respond to a baby's cries. A crying baby would attract competetors/carnivores attention!
2007-04-27 11:02:45 · answer #1 · answered by melanie 5 · 0⤊ 0⤋
Pretty much the same reason that the sound of a dentist's drill produces the same result!
2007-04-27 10:46:37 · answer #2 · answered by Curiosity 7 · 0⤊ 0⤋
Since you asked about a human "response", I suggest that
you re-ask this question under the heading, "social science /
psychology".
2007-04-27 13:52:01 · answer #3 · answered by ursaitaliano70 7 · 0⤊ 0⤋
it just does because of the stuff the nail is made of . most things make a sound when you scape your fingernail on it
2007-04-27 11:17:34 · answer #4 · answered by i ask dumb things 4 · 0⤊ 0⤋
Its something called friction which creates sounds waves...you will learn it when you get into about year 2...let me know when youve finished primary school.
2007-04-27 10:46:32 · answer #5 · answered by John 2 · 0⤊ 1⤋
its really high pitched and squeaky, it shocks you and sends shivers down your spine- I recon this is because the sound waves are so jigh pitched, you can actually physically feel it in your head!
2007-04-27 10:47:01 · answer #6 · answered by Anonymous · 0⤊ 0⤋
ohh thats horrible its cos of friction !!!!!
2007-04-28 23:43:05 · answer #7 · answered by gayatri r 3 · 0⤊ 0⤋
no, but i have shivers down my back thinking about it
2007-04-27 10:47:45 · answer #8 · answered by Anonymous · 0⤊ 0⤋
friction?
2007-04-27 10:46:11 · answer #9 · answered by Anonymous · 0⤊ 0⤋