Noise levels at stadiums during next month's FIFA World Cup in South Africa could affect the safety of spectators, Danny Jordaan, chief executive of South Africa's World Cup local organizing committee, said on Thursday.
Jordaan also said that too much noise could affect the ability of security personnel to communicate with each other.
"You must look at the circumstances in the stadiums," Jordaan told the media at Ellis Park, one of Johannesburg's two FIFA World Cup stadiums.
"If there is an evacuation order will everyone hear that order? " the South African Press Association (SAPA) quoted Jordaan as saying.
Although he did not mention the vuvuzela by name, there have been concerns about the noise levels produced by thousands of these plastic trumpets beloved by South African football fans.
In February the South African Medical Journal (SAMJ) published an article demonstrating that the vuvuzela exceeds the permissible occupational noise exposure levels in South Africa.
It said the vuvuzela poses a significant recreational risk of noise-induced hearing loss.
The SAMJ recommended preventive measures such as public awareness and hearing protection should be prioritized.
"The vuvuzela has reached iconic status and should be kept as part of the South African soccer culture, but measures to protect spectators' hearing must be considered of paramount importance."
On Thursday, Jordaan expressed concern that noise might interfere with such things as the singing of the various countries ' national anthems.
否定转移
比较while, when, as
动词的语态
will和would
谓语需用单数
指代意义决定谓语的单复数
反意疑问句
倒装句之全部倒装
感叹句结构
虚拟条件句的倒装
表示"据说"或"相信" 的词组
句子的种类
would rather表示"宁愿"
关系副词引导的定语从句
结果状语从句
关系代词引导的定语从句
表示"一…就…"的结构
过去进行时
as, which 非限定性定语从句
并列结构作主语时谓语用复数
真实条件句
与后接名词或代词保持一致
被动形式表示主动意义
关系代词that 的用法
if, whether引导的名词从句
牛津实用英语语法 a/an(不定冠词)
名词性wh
must表示推测
其他部分倒装
主动形式表示被动意义
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