ISO 9902-3:2001 PDF

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

• ISO 9902-1:2001 (Common requirements)
• ISO 9902-2, -6, -7 (other textile machinery parts)
• ISO 9614-1/2 (sound intensity)
• ISO 3744 / 3746 / 3747 (sound power via sound pressure)
• ISO 11201 / 11202 / 11204 (emission sound pressure measurements)

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.