World Cup organising committee chairman Danny Jordaan says that a ban on vuvuzelas inside stadiums is under consideration following complaints about the instrument.
The constant loud buzzing generated by the vuvuzelas inside World Cup stadiums has been a prominent feature of the tournament, with opinion divided as to whether they have a positive impact on the atmosphere for games.
While South Africa goalkeeper Itumeleng Khune complained that the vuvuzelas were not loud enough during the country's opening game against Mexico, some players have complained about the droning noise and broadcasters also have reservations.
Jordaan says the situation is being closely monitored by the organising committee and that a ban on the instrument could not be ruled out.
"If there are grounds to do so, yes," Jordaan told BBC Sport. "We did say that if any land on the pitch in anger we will take action.
"We've tried to get some order. We have asked for no vuvuzelas during national anthems or stadium announcements. It's difficult but we're trying to manage the best we can.
"We've had some broadcasters and individuals (complaining) and it's something we are evaluating on an on-going basis.
"I would prefer singing. It's always been a great generator of a wonderful atmosphere in stadiums and I would try to encourage them to sing.
"In the days of the struggle (against apartheid) we were singing, all through our history it's our ability to sing that inspired and drove the emotions."