Overview
EN ISO 9902-2:2001 - Textile machinery - Noise test code - Part 2: Spinning preparatory and spinning machinery (ISO 9902-2:2001) specifies the mounting, operating and measuring conditions required to measure, declare and verify noise emitted by spinning preparatory and spinning machines. It is a Part 2 complement to ISO 9902-1 (common requirements) and applies to engineering (grade 2) and survey (grade 3) methods for noise measurement of textile equipment such as opening, cleaning and blending machines, wool scouring, baling, carding, tow cutting, stretch breaking, spinning preparation after carding and spinning (machines listed in ISO 2187).
Key topics and technical requirements
- Scope and test object definition: Defines which spinning preparatory and spinning machine families are covered and which components are included or excluded from tests.
- Measurement methods: Accepts sound power and emission sound pressure determination using recognized acoustics standards:
- Workstation measurement options: Provides defined measurement-position options (e.g., linear arrays at 1 m distance / measurement heights at 1.6 m; multi-position grids) to determine A-weighted emission sound pressure levels (LpA) representative of operator exposure.
- Installation, mounting and operating conditions: Specifies how machines shall be mounted and operated during tests to ensure repeatable and comparable results (refer to ISO 9902-1 for common requirements).
- Declaration and verification: Sets the framework for declaring noise emission values and for verifying declared data against measured results.
- Uncertainty & reporting: Requires recording measurement uncertainties and prescribed test report content for transparency and conformity assessment.
Practical applications and users
- Machine manufacturers: For design validation, noise reduction, and to prepare noise declarations on product data sheets.
- Test laboratories / acousticians: To perform standardized noise measurements and provide certification or compliance testing.
- Occupational safety and compliance teams: To assess operator noise exposure and to support compliance with EU Machinery Directive requirements.
- Procurement and R&D: To compare equipment noise performance and prioritize quieter machinery in production planning.
Related standards
EN ISO 9902-2:2001 is an essential standard for consistent, repeatable noise measurement and reporting in the textile spinning sector, facilitating safer workplaces and compliance with regulatory requirements.