Defines the procedures for noise control of mainly open plants. It is applicable to the following: - Specification of procedures for noise control during engineering of a new plant and modification/extension of existing plants (construction noise procedures are outside the scope of this standard but should be considered); - Definition of responsibilities of parties involved, viz. 'End-user', 'Engineering Contractor' and 'Equipment Supplier'; - Description of general procedures to arrive at noise requirements for individual equipment, on the basis of overall noise requirements for the plant.