Overview
EN ISO 9902-6:2021 - Textile machinery - Noise test code - Part 6: Fabric manufacturing machinery (ISO 9902-6:2018) is a CEN-endorsed part of the ISO 9902 series that specifies acoustic test procedures for a wide range of fabric manufacturing machines. It applies to full‑width and narrow weaving machines, jacquard machines, and knitting machinery (circular, flat bed, warp, raschel, cotton/flat weft), plus other fabric production equipment (multi‑phase, circular weaving, stitch bonding). The document defines how to measure and report noise emission, including sound power levels and emission sound pressure levels at work stations.
Key topics and technical requirements
- Scope & test object definition: Identifies machine types covered and references ISO 5247 and ISO 7839 for machine classifications.
- Sound power determination: Requires measurement by sound intensity (ISO 9614‑1/2) or by sound pressure on prescribed measurement surfaces using ISO 3744, ISO 3747 or ISO 3746 where appropriate.
- Emission sound pressure at work station: Specifies methods for measuring A‑weighted emission sound pressure levels using ISO 11201, ISO 11204 or ISO 11202 (when others are impractical).
- Selection of measurement positions: Defines work station and specified positions for different machine types (weaving, knitting, narrow fabric, circular machines, jacquard).
- Installation and operating conditions: Stresses reproducible mounting and operating states to ensure valid, repeatable acoustic results.
- Measurement uncertainty & reporting: Requires recording operating conditions, uncertainties, and standardized reporting formats for declaration and verification of noise emission values.
- Practical constraints: Notes that grade 1 methods (highest precision) are often not feasible for textile machinery due to measurement environment and machine size; large machines may be designated “L”.
Practical applications and users
Who uses EN ISO 9902-6:2021:
- Textile machinery manufacturers (OEMs) - for product development, noise reduction and to declare noise emission values.
- Acoustic test laboratories - to perform compliant sound power and emission sound pressure measurements.
- Safety & compliance officers - to evaluate worker exposure and meet regulatory or procurement requirements.
- Design and R&D engineers - to identify noise sources and implement mitigation (enclosures, damping, layout changes).
- Purchasers and specifiers - to compare machinery based on standardized noise data.
Practical benefits:
- Enables consistent acoustic testing across manufacturers and labs.
- Supports manufacturer declarations used in specifications, CE marking contexts and workplace noise assessments.
- Helps target noise control measures in fabric manufacturing environments.
Related standards
Keywords: EN ISO 9902-6:2021, textile machinery noise test code, fabric manufacturing machinery, weaving machines, knitting machines, sound power level, emission sound pressure, acoustic testing.