It's not perfect and the settings I've used below sometimes need a bit of adjustment, below is an image of where I have the settings for UK BBC World Cup games - you may need further adjustments for your own broadcaster.
First turn on the Equalizer by clicking the 'View' menu and clicking 'Equalizer'. Then when the equalizer is displayed click the 'Turn On' button if it is off. Then adjust the settings like the image below, and play around with the levels a bit to reduce the volume of the Vuvuzelas to an acceptable level.
Direct link to full size image (below is cut down):
http://www.zilefile.com/files/11496_ks0 ... DVB_EQ.png
http://news.slashdot.org/story/10/06/15 ... art_pos=11
Lifehacker article:
http://lifehacker.com/5564085/how-to-si ... e=true&s=i
Hope this helps.
