<a href="http://www.newscientist.com/article/dn19041-what-makes-the-sound-of-vuvuzelas-so-annoying.html"> What makes the sound of vuvuzelas so annoying</a>
You're welcome.
EDIT: also you'll notice that compared to initial matches the sounds of the vuvuzelas seem to have dwindled enough to hear the chants, singing, and drumming of fans. This is due to the recent implementation of a new filter that helps to drown out the audible droning.
Also. England got well smashed today by Germany, WooTs! Also. Viva la World Cup and 10 am beer.