Originally Posted by boo boo

And if you think that was annoying.

The Savart's Wheel:



This device was made specifically to create the most grating, irritating sound imaginable, but still have a melodic range. Something like a Rooster getting its balls torn off. Its made up of discs of graduating size (to create a funnel shape) on a motor powered spindle. The discs are covered in ridges, as the discs rotate, the player holds a plectrum against the ridges. Creating its trademark tone of horror. Each disc controls a different frequency.

http://www.windworld.com/feature_pag...babyplease.mp3
Click on it, if you dare.