Their cacophonous din has so far been a soundtrack for the World Cup, to the delight of some and the profound annoyance of others. But organisers said that the vuvuzela, one of the most visible and certainly most audible motifs of the tournament's opening weekend, could yet be banned from inside stadiums. 
 
 Organising committee chief executive Danny Jordaan said he would continue to monitor their use and that a ban could be enforced if there were "grounds to do so". 
 
 Fifa and organisers have already said that they will ban the instrument if any are thrown onto the pitch or used as a weapon and urged fans not to blow them during national anthems. 
 
 "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," he told the BBC. 
 
 "We've had some broadcasters and individuals [complaining] and it's something we are evaluating on an on-going basis." The BBC and ITV have received complaints from viewers about the background noise and, while both have said they will monitor the situation, they have also made the point that it is important to reflect the atmosphere of the tournament. 
 
 Fifa has previously shrugged off complaints from broadcasters, players and coaches about the noise from the plastic horns that are being sold on every street corner in South African host cities. 
 
 Following last year's Confederations Cup, there were complaints from coaches, players and broadcasters about the noise. But Fifa said that the horns formed part of the unique African atmosphere of the tournament and refused to ban them. 
 
 But Jordaan himself, who battled for 16 years to bring the World Cup to South Africa, said he would prefer the 10 stadiums hosting the World Cup to ring to the sound of singing and dancing than the drone of the vuvuzela. 
 
 "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," he said. 
 
 "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." ||||| Please turn on JavaScript. Media requires JavaScript to play. Advertisement World Cup organisers say they will not ban vuvuzelas from stadiums in South Africa, despite numerous complaints. The sound of the plastic horn has been likened to the drone of a thousand bees or a herd of stampeding elephants. Portugal winger Cristiano Ronaldo says the noise affects player concentration, while some fans watching on television claim they cannot hear the commentary. But a World Cup spokesman insisted vuvuzelas are "ingrained in the history of South Africa" and will remain. Rich Mkhondo also said vuvuzelas had worldwide appeal. "Let us not make this a South Africa instrument alone," he said. "A vuvuzela is now an international instrument. People buy them and stuff them in their suitcase to go home. "Only a minority are against vuvuzelas. You either love them or hate. We in South Africa love them." England defender Jamie Carragher said the noise did not bother him when he came on as a half-time substitute during the 1-1 draw with the United States and he said he had already bought two to take home to his children in Liverpool. I have always said that Africa has a different rhythm, a different sound 
 
 Fifa president Sepp Blatter "When I came on I didn't notice it too much. I think you notice it more when you are watching on TV," he said. "But my kids have been on the phone and asked for two so I'll have to take two home for them. I've got two in my bag already. "Anyone who watches me play at Anfield will know that I am louder than the vuvuzelas!" Fifa president Sepp Blatter also weighed into the debate and believes vuvuzelas are part and parcel of football in South Africa. "I have always said that Africa has a different rhythm, a different sound," he commented on social networking site Twitter. "I don't see banning the music traditions of fans in their own country. Would you want to see a ban on the fan traditions in your country?" A recent survey found that the sound emitted by a vuvuzela was the equivalent to 127 decibels - louder than a drum's 122 decibels or a referee's whistle at 121.8 decibels. Please turn on JavaScript. Media requires JavaScript to play. Portugal star Ronaldo is the latest World Cup star to voice unease about the instrument. "It is difficult for anyone on the pitch to concentrate," said the Real Madrid forward. "A lot of players don't like them but they are going to have to get used to them." France captain Patrice Evra blamed the noise generated by the vuvuzelas for his side's poor showing in their opening group game against Uruguay, which finished goalless. He added: "We can't sleep at night because of the vuvuzelas. People start playing them from 6am. "We can't hear one another out on the pitch because of them." Backing for the under-fire vuvuzela has come from the England Supporters' Band, which has not missed an England game - home or away - since 1996. Trumpeter John Hemmingham, who is leading an eight-man team in South Africa, said the plastic instruments were part of the local culture and should not be banned from stadiums. 606: DEBATE I'm all for them - let South Africa host the tournament in their own inimitable style 
 
 BBC Sport's Peter Scrivener "It's the way the South Africans express their joy and pleasure at the tournament being here," said Hemmingham. "It's certainly a challenge for us but there's no point whinging about it." Some people have complained the noise from the vuvuzelas has stopped fans from generating chants around the ground. But Hemmingham, who was at Saturday's game between England and the United States in Rustenburg, revealed: "We didn't have any problem. "The fans around us were all singing along and a lot of our fans were joining in with us using their vuvuzelas. It all added to the atmosphere. "There was definitely a different vibe about the place - the South Africans are loving it - and when in Rome, you just have to go along with it. "I bet there is not a single South African player complaining about the vuvuzela. They see it as more than just a noise, it's about the whole spirit of the thing." 
 
 
 
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– The nonstop drone of plastic horns has been the soundtrack of the World Cup so far, on and off the field, and they're so annoying that FIFA is considering a ban. It can't come soon enough for some. "We can't sleep at night because of the vuvuzelas." the French captain tells the BBC. "We can't hear one another out on the pitch because of them." The cacophony isn't exactly music to the ears of the head of the organizing committee, which has already threatened to keep the omnipresent vuvuzelas out if any are thrown onto the pitch or used violently, reports the Guardian. "I would prefer singing," Danny Jordaan acknowledges. "It's always been a great generator of a wonderful atmosphere in stadiums and I would try to encourage them to sing."