对新建厂房及其周围环境进行噪声预评价,以便将噪声控制项目与主体工程同时设计、同时施工、同时投入运行,这是噪声控制工程中合理的设计手段.它可以防污染于未然,比在厂房峻工和设备就位运转后再采取被动措施省时省力,且能作到更合理的控制和恰当的布置.现在有关环境保护和劳动保护的项目设计规范都要求按此原则执行. Pre-assessment of noise for newly-built plant and its surroundings so that the noise control project is designed, constructed and put into operation simultaneously with the main project is a reasonable design measure in noise control project, which can prevent pollution in the first place, After the completion of the workshop and the operation of the equipment, passive measures are taken to save time and effort, and more reasonable control and proper arrangement can be achieved. Now the project design specifications on environmental protection and labor protection all require implementation according to this principle.