The vuvuzela is most used at football matches in South Africa, and it has become a symbol of South African football as the stadiums are filled with its loud and raucous sound that reflects the exhilaration of supporters. The intensity of the sound caught the attention of the global football community during the 2009 FIFA Confederations Cup in anticipation of South Africa hosting the 2010 FIFA World Cup.
The vuvuzela has been the subject of controversy when used by spectators at football matches. Its high sound pressure levels at close range can lead to permanent hearing loss for unprotected ears after exposure, with a sound pressure of 120 dB(A) (the threshold of pain) at 1 metre (3.3 ft) from the device opening. (wikipedia)
This could be used for, say, keeping certain negotiators (We’re talking about you Mr Stern) awake with a 24 hour vuvuzela choir vigil outside his hotel. Just a thought.