This part of ISO 9902, taken together with ISO 9902-1, specifies the mounting, operating and measuring conditions required for the measurement, declaration and verification of noise emitted by yarn processing, cordage and rope manufacturing machinery. This part of ISO 9902 is applicable to engineering (grade 2) and survey (grade 3) test methods, in accordance with the International Standards to which it makes normative reference, and to machines of different types used for — yarn processing (e.g. doubling, twisting and texturing machines, reeling and winding machines, ball winding machines), — cordage and rope manufacturing (e.g. goods machines or spreaders, breakers, draw frames and finishers), — combined stranding and closing, strand-plaited rope-making, and — braiding.