A recent story in Consumer Reports offers up a few ways to eliminate nearly all vuvuzela sounds just by making a few adjustments on your home theater equipment. Find out what they are after the break.
First, try turning your TV's treble all the way down. This won't totally erase all horn sounds, but it at least will make things tolerable during your most important matches.
If you have a surround sound system at home, try this method: From your sound system menu, lower the volume of the left and right speakers, while boosting the sound coming from the center. This will both drown out crowd noises (from left and right), and make the commentators more audible (from the front).