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.