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 nonwoven machinery. It defines a noise test code for — cross lappers, — lap drafters, — pre-needle machines, — needle punchers, — stitch bonding machines (nonwovens), — water jet bonding machines, and — praying machines. The other machines of nonwoven lines are covered in ISO 9902-2, ISO 9902-6 and ISO 9902-7. 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.