Overview
ISO 9902-2:2001 - "Textile machinery - Noise test code - Part 2: Spinning preparatory and spinning machinery" specifies the acoustic measurement, declaration and verification requirements for noise emitted by spinning preparatory and spinning machinery. It is intended to be used together with ISO 9902-1:2001 (Common requirements) and defines how to determine A‑weighted sound power (LWA) and emission sound pressure levels (LpA) for machine families used in spinning preparation, carding, scouring, baling and spinning operations.
Key keywords: ISO 9902-2:2001, textile machinery, noise test code, spinning machinery, sound power, emission sound pressure, acoustic measurement.
Key topics and requirements
- Scope and applicability
- Applies to spinning preparatory and spinning machines (e.g., opening/cleaning/blending, carding, spinning).
- Covers engineering (grade 2) and survey (grade 3) measurement methods.
- Measurement methods
- Workstation definitions and measurement positions
- Defines three options (d, e, f) for selecting measurement positions - e.g., measurement line 1 m from machine surface at 1.6 m height, or three- or nine-point grids at 1.6 m.
- In restricted spaces measurement distance may be reduced to 0.5 m (must be reported).
- Test conditions and reporting
- Installation, mounting and operating conditions are specified (see ISO 9902‑1 and Table 1 of Part 2).
- Table 1 prescribes machine-family specific equipment inclusion/exclusion, operating parameters to report, and when machines are classed as “very large.”
- Requirements for measurement uncertainty, information to record and report, and declaration/verification procedures.
Applications and users
- Who uses it:
- Textile machinery manufacturers for design validation and noise declarations.
- Acoustic test laboratories performing product conformity tests.
- Occupational safety engineers assessing workplace noise exposure.
- Procurement and compliance teams requiring verified noise data.
- Practical uses:
- Producing standardized noise declarations for product data sheets.
- Verifying supplier noise claims during acceptance testing.
- Informing noise control measures, machine layout and hearing protection strategies in textile plants.
Related standards
This standard is essential when consistent, comparable acoustic data for spinning and preparatory textile machinery are required for compliance, design and occupational noise control.