2010 In WOULD YOU SHUT THE #&@! UP ALREADY WITH THAT STUPID HORN???!!!: The obnoxious sound of the year (non-political division) was the vuvuzela, introduced to the world as the inescapable background of the 2010 World Cup in Johannesburg. I could explain it to future generations, but it'd be easier to just show you.
For maximum irritation, fire all three up at the same time. Sleep tight!