TEKNIK ELEKTRONIKA

While many websites have suggested solutions to silencing or at least reducing the constant drone of vuvuzelas during Word Cup Soccer games, none have offered much in the way of a solution you can use at home. Now Simon Hogg, a LABVIEW product manager has published an application that detects the fundamental frequency of the vuvuzelas (around 233 Hz) and applies a notch filter to it and as many harmonics as you specify. The end result reportedly is a significant reduction in the annoying background noise without too much interruption of the commentary and other audio.

Hardware-wise you will need to insert your computer in the audio signal flow. If your TV has an audio output, connect that to your sound card's line in, then connect your sound card output to however you want to listen to the game (speakers or headphones).

In Simon’s setup, the game output is streamed to an old PC and the audio output to a laptop, which applies the filter and then outputs to headphones.

All resources needed to implement the filter are available at the web page below.
More info
http://decibel.ni.com/content/docs/DOC-12151 Extra:
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