The Brits needed a tool to turn down the noises from the tennis players and the BBC devised a way for internet audio to be selectively reduced.
http://www.dailymail.co.uk/sciencetech/article-2009817/BBC-launches-tool-silencing-Wimbledon-players-grunts-Shrieking-Maria-Sharapova.html
http://www.dailymail.co.uk/sciencetech/article-2009817/BBC-launches-tool-silencing-Wimbledon-players-grunts-Shrieking-Maria-Sharapova.html