Overview
ISO 9902-3:2001 - Textile machinery - Noise test code - Part 3: Nonwoven machinery specifies how to measure, declare and verify noise emissions from nonwoven textile machinery. Published by ISO in 2001, this part complements ISO 9902-1 (common requirements) and applies engineering (grade 2) and survey (grade 3) test methods for equipment such as carding, lap drafters, needle punchers, stitch-bonding and water-jet bonding machines. The standard sets mounting, operating and measurement conditions for reliable noise reporting and verification.
Key topics and technical requirements
- Scope and test objects: Defines machine families covered (cross lappers, lap drafters, pre-needle machines, needle punchers, stitch-bonding machines, water-jet bonding machines, spray-bonding machines) and links to Table 1 for machine-specific measurement conditions.
- Measurement methods: Sound power level (A-weighted LWA) via sound intensity (ISO 9614-1/2) or surface sound pressure methods (ISO 3744, 3747, 3746 where applicable). Emission sound pressure levels (LpA) measured per ISO 11201, ISO 11204 or ISO 11202 (survey method only if others impracticable).
- Work station definition: For nonwoven machinery, measurement positions are on a 1 m-radius line around the machine at 1.6 m height; positions spaced so adjacent points are ≤ 2 m - values from these positions are used to calculate the emission level.
- Operating and mounting conditions: Prescribed operating speeds and parameters appear in Table 1 (e.g., typical testing at 80–85% of maximum feed speed for some machines). Installation, mounting and environmental corrections follow ISO 9902-1 references.
- Data and uncertainty: Specifies information to record and report, measurement uncertainties, and procedures for declaration and verification of noise emission values.
Applications and who uses it
- Textile machinery manufacturers: for authoritative noise declaration during design validation and product documentation.
- Test laboratories and acoustic consultants: to perform reproducible sound power and emission measurements for compliance or purchaser verification.
- Occupational health and safety professionals: to assess machinery noise at workstations and support hearing conservation programs.
- Procurement and compliance officers: to compare machines using standardized noise data during selection and acceptance testing.
Related standards
Keywords: ISO 9902-3:2001, textile machinery, noise test code, nonwoven machinery, sound power level, emission sound pressure level, acoustic testing, ISO 9614, ISO 3744, ISO 11201.
