ok, i know this is a dumb question, but sometimes i notice when people chalk it makes that "screeching sound", like nails on chalkboard. other times its about like the sound of shaking sugar around in a container.
what accounts for the sound difference? assume its the hardness of the tip? the newness? new chalk?
DCP
what accounts for the sound difference? assume its the hardness of the tip? the newness? new chalk?
DCP