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为制订和贯彻船舶噪声的限值标准,在研究船舶噪声对船员健康的影响和防护措施时,经常需了解船员在船上每天实际接触噪声的量的多少,或要了解在一定时间内,船员受船舶噪声影响对健康的危害程度多大。 由于船员的工作制度、生活条件与陆上工人情况不同,接触噪声的情况因航区的变化、航行任务的变化,航修和停泊的变化而变化。船员在机舱内工作,由于工况不同,担任职务的不同,接触噪声也不同,从这点来说,船舶噪声是属于非稳态噪声。 为此就应采用能量平均的方法,在船员接触噪声的一定位置上,将某段时间内,间歇暴
In order to formulate and implement the ship noise limits, it is often necessary to understand how much the crew actually touches the noise on board each day when studying the effects of ship noise on seafarers’ health and protective measures. Or, it is necessary to understand how, within a certain period of time, The extent to which the impact of ship noise on health is so great. Owing to the crew’s work system, living conditions and land-based workers, the exposure to noise varies with the change of the navigation area, the change of navigation mission, the repair of air navigation and parking. The crew members working in the engine room have different contact noise due to different working conditions and different positions. From this point of view, the ship noise is unsteady noise. To this end should be the method of energy averaging, the crew in contact with the noise of a certain location, will be some time, intermittent violence