Stories tagged world cup

Jun
14
2010

I'm sure there's a lot of jokes I could make about stereotypical tensions between nerds and jocks, but there's science to be had at the World Cup, and I'm never one to back down from an exercise in applied physics.
Vuvuzelas: Fans raise their vuvuzelas in celebration of soccer season
Vuvuzelas: Fans raise their vuvuzelas in celebration of soccer seasonCourtesy Manuguf

If you've been watching any of the matches on TV or have any friends that are, you may have heard about the controversy centered around a popular fan item - the vuvuzela. Vuvuzelas are plastic trumpets used by soccer fans in South Africa to cheer on their team and goad the opponents. When blown, they can achieve decibel levels upwards of close to 130 dB. That's as loud as a loud rock concert or a jet at take off.

It's gotten to the point that referees and coaches want the horns banned, and fans at home are complaining that the noise is drowning out network commentary.

Now for the science. Editors at the German blog Surfpoeten have pointed out that because the horn has a simple acoustic fingerprint (tones at 233, 466, 932, and 1864 Hz), very basic filtering software can remove the vuvuzeula drone from broadcast media (original German link). This may not prevent the players on the field from having to endure the noise, but it could at least help out the estimated 125 million people watching at home (per match).

This same idea may be in use in technology you own. Noise cancelling headphones have been around for a while. They sample ambient audio around you and play an opposing wave to cancel it out. Much like with the vuvuzelas, monotone sounds such as lawnmowers and airplane engines are the easiest to block.

The Pan American Health Organization is so alarmed that it has warned fans from the Americas to get immunised before leaving for Germany. New Scientist magazine