根据新的欧洲指令 ,必须对室外所用各种设备产生的噪声进行测量并将其控制在规定的范围。２００１年这条规则将写入英国法律 ,其范围涉及建筑设备、园艺设施、电梯、泵、钻井和锯以及现行指令所涵盖的所有类似设备。要求厂家保证所测的５７种设备具有正确的功率电平 ,其中２２ Under the new European directive, the noise generated by the various equipment used outdoors must be measured and controlled within the specified limits. This rule will be written into English law in 2001 and covers a wide range of construction equipment, horticultural facilities, elevators, pumps, drilling and sawing, and all similar equipment covered by current directives. The manufacturer is required to ensure that the 57 devices tested have the correct power level, of which 22