ISO 10302-1:2024

Overview

ISO 10302-1:2024 - "Acoustics - Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices - Part 1: Airborne noise measurement" specifies standardized methods for measuring airborne noise from small air-moving devices (AMDs). This second-edition standard updates and replaces ISO 10302-1:2011 and is intended to produce comparable sound power level data for cooling fans, micro-fans, impellers and similar devices used in electronic, electrical and mechanical equipment.

Key highlights:

• Focus on A-weighted sound power level and one‑third‑octave-band descriptors (octave bands optional), aligned with ISO 7779.
• Measurement of noise as a function of volume flow rate and fan static pressure using a defined test plenum and test procedures.
• Applicability includes propeller, tube-axial, vane-axial, centrifugal fans and motorized impellers; micro-fans are defined (maximum volume flow ≤ 0.015 m³/s).

Key Topics and Requirements

• Test plenum design and performance: requirements for full-, half- and quarter-size plenums including insertion loss and instrumentation for static pressure.
• Installation and mounting: procedures for positioning the plenum and mounting AMDs in a test room, and specifying airflow direction.
• Operation points: selection of points of operation with both Method A (conventional) and Method B (alternative) for AC and DC devices, plus procedures for input power control.
• Micro-fan specifics: Annex A provides a p–q curve measurement method tailored for micro-fans.
• Acoustic measurement methods: microphone arrays and positions (hemisphere or coaxial circular paths) for an essentially free field over a reflecting plane.
• Measurement uncertainty and reporting: guidance on uncertainty estimation, required recorded information and reporting formats (Annexes B–E cover density effects, data formats, noise specifications and uncertainty guidance).
• Extended static pressure limits for scaled plenums: up to 750 Pa (full-size), 1 500 Pa (half-size) and 3 000 Pa (quarter-size).

Practical Applications and Users

ISO 10302-1:2024 is aimed at:

• AMD manufacturers producing fans, blowers and micro-fans.
• Equipment manufacturers integrating AMDs into servers, telecoms, consumer electronics and industrial systems.
• Testing laboratories performing sound power and performance verification tests.
• Procurement and specification writers who require standardized noise data for contracts and purchase specifications.

Practical uses:

• Engineering design and thermal/noise trade-offs for equipment cooling systems.
• Performance verification and quality control of fans and impellers.
• Supplying comparable noise data for vendor selection and compliance.

Related Standards

• ISO 7779 (measurement descriptors and methods for IT and telecom equipment)
• ISO 3741 / ISO 3744 / ISO 3745 (sound power determination methods)
• ISO 5801 (fan performance testing)

Keywords: ISO 10302-1:2024, acoustics, airborne noise measurement, air-moving devices, sound power level, micro-fan, test plenum, measurement uncertainty, fan noise testing.