#1 A KNIFE SCRAPING AGAINST A BOTTLE.
#2 A FORK SCRAPING AGAINST GLASS.
#3 CHALK ON A BLACKBOARD.
#4 A RULER SCRAPING ON A BOTTLE.
#5 NAILS ON A BLACKBOARD
#6 A FEMALE SCREAM
#7 ANGLE GRINDER
#8 SQUEALING BIKE BRAKES
#9 A CRYING BABY
#10 ELECTRIC DRILL
(ACCORDING TO SCIENTISTS AT NEWCASTLE UNIVERSITY)