Title :
Noise source identification test of fan on beamformin
Author :
Yuntao Liu ; Zhiying Gao ; Zheng Chang ; Zhentao Yang ; Yunzhi Li ; Zhiguang Wang
Author_Institution :
Coll. of Energy & Power Eng., Inner Mongolia Univ. of Technol., Hohhot, China
Abstract :
In order to solve the fan noise problems, it was applied noise sources identification and analyses system with 60-channel microphone array, which can carry out the measurement of full-field sound pressure of the fan and reconstruct the sound pressure distribution of full-field sound pressure at different rotate speed in corresponding frequency. Through analyzing the experimental results, it was found that the maximum sound pressure level of the fan corresponding to mid-frequency of band is 1 KHz; the maximum sound pressure level of the fan were located at centre when it was at different rotational speed, and the pressure level of noise source decreases with the increase of r/R; and the optimal measuring distance for noise sources identification of the fan is 1.1m.
Keywords :
array signal processing; microphone arrays; noise; signal reconstruction; 60-channel microphone array; beamforming; fan noise problems; noise source identification test; sound pressure distribution reconstruction; Acoustics; Arrays; Frequency measurement; Noise; Noise measurement; Pressure measurement; Rotation measurement; Beamforming; Fan; Noise source;
Conference_Titel :
Network Infrastructure and Digital Content (IC-NIDC), 2012 3rd IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-2201-0
DOI :
10.1109/ICNIDC.2012.6418828
