"The recognition of noise as a serious health hazard as opposed to a nuisance is a recent development and the health effects of hazardous noise exposure are now considered to be an increasingly important public health problem" (WHO 2001). Workplace noise exposure is a common reality in Quebec and worldwide. In 1990, approximately 30 million people in the USA were exposed to daily occupational noise levels greater than 85 dBA, compared to over nine million in 1981 (WHO 2001). In 1998, the Institut de la statistique du Quebec (Quebec Statistical Institute) estimated that 12.8% of Quebec workers were exposed, often or always, to occupational noises hindering conversations occurring a few feet away, even when shouted (ISQ 2001). Projected to the 2005 worker population, this would represent an estimated 476,000 workers.
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机译：“对严重健康危害的噪音确认，而不是滋扰是最近的发展，并且危险噪声暴露的健康影响现在被认为是一个越来越重要的公共卫生问题”（Who 2001）。工作场所噪音曝光是魁北克和全球的常见现实。 1990年，美国约有3000万人接触到日常职业噪音水平，比1981年超过九百万（世卫组织2001年）。 1998年，Institut de La Statistique du魁北克（魁北克统计学院）估计，12.8％的魁北克工人常常或始终被暴露在职业声音阻碍谈话的呼声发生在几英尺远的情况下，即使在喊道时（ISQ 2001）。预计2005年工人人口，这将代表估计的476,000名工人。
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