Question

What puts people on edge when you scratch a chalk board?

Answer 1

The two sounds rated as the most unpleasant, they said, were fingernails scratching on a chalkboard and a piece of chalk running against slate.They found that the offensive sounds changed the listeners' skin conductivity significantly, showing that they really do cause a measureable, physical stress reaction.

I HATE THAT FEELING. Ugh. But I hope I helped you.

Answer 2

Answer:

The mere thought of fingernails scratching a chalkboard can be enough to set some people on edge. ... Researchers say the shape of the human ear may amplify certain aspects of the sound of fingernails or chalk scraping on a chalkboard to make it even more annoying to the listener.