Why do screeching noises like nails on a chalk board or a knife on a plate cause some people a kind of physical feeling of discomfort? - Quora
![Wishbone on Twitter: "Sound of nails scratching chalkboard or cat screeching? http://t.co/mV26Fgx2pG http://t.co/btZtX1AaUQ" / Twitter Wishbone on Twitter: "Sound of nails scratching chalkboard or cat screeching? http://t.co/mV26Fgx2pG http://t.co/btZtX1AaUQ" / Twitter](https://pbs.twimg.com/media/CNm1yfrUYAAsNeP.jpg)
Wishbone on Twitter: "Sound of nails scratching chalkboard or cat screeching? http://t.co/mV26Fgx2pG http://t.co/btZtX1AaUQ" / Twitter
![SOLVED:When you push a piece of chalk across a chalkboard, it sometimes screeches because it rapidly alternates between slipping and sticking to the board. Describe this process in more detail, in particular, SOLVED:When you push a piece of chalk across a chalkboard, it sometimes screeches because it rapidly alternates between slipping and sticking to the board. Describe this process in more detail, in particular,](https://cdn.numerade.com/previews/c44ef54c-cc53-4c59-9ec2-adbd1693486d.gif)