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Sound Emisslve Technique of Controlling Fan's Noise

Cheng Xu; Yang Zhijun; Zhang Jianrun et al.  
In this paper the sound intensity identified method of near acoustic field was empoyed in three dimensional diagram of sound intensity distribution on centrifugal fan shell. The developed double-deck microperforated resonator which was optimiaed for taking sound absotption coefficient a as objective function solved effectively wide-band sound absorptioon. Its application shows that it is effective to control the noise radiation of fan shell and reduce noise by forty percent.
【CateGory Index】: TB535
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