Test project
noise
Test Equipment
Multi-Channel Analysis System: Heim DIC6B
Microphone: GRAS 46AE
Sound Level Calibrator: B&K 4231
DC Power Supply: GW PSH-3630A
Tape Measure
Thermo-Hygrometer: Foxconn KPC-101A
Test Conditions
1、Reference Document: ISO3744:2010 (E) B.1 table B.2
2、Frequency Range: 20Hz~16000 Hz
3、Frequency Weighting: A Weighting
4、Ambient Condition: 22.0°C~22.2°C.,50.0%RH~57.0%RH
5、Test Setup: (The Z-axis numerical height is the difference between the microphoneheight and the height of the sample center)


Test Procedure
1、Use Sound Level Calibrator to Calibrate the Microphones
2、Sound Pressure Level (SPL) Measurements for EUT
2.1、Set up EUT and Microphones Based on Customer Self Definition
2.2、Measure Background Noise
2.3、Measure the power spectrum density of the test Samples at Rated Voltage(13.5V)from Low to High Speed
2.4、Make the fan work at different fixed speeds and measure the sound
Test Results













