摘要
分析了对旋式局部通风机的主要噪声源,指出了A声级对噪声评价的不足,并对对旋式局部通风机噪声频率进行了分析研究,根据各频段频谱特性,采用移频技术,合理设计消声器,达到了真正降噪的目的。
In this paper,the deficiency of using A sound level for noise evaluation was pointed out and analysis was carried out on the noise frequency of the mine contra-rotating auxiliary fan.Based on the frequency spectrum characteristics of each band,a muffler was rationally designed with frequency shifting technology,and the true purpose of noise reduction was finally achieved.
出处
《矿业安全与环保》
北大核心
2013年第4期43-45,49,共4页
Mining Safety & Environmental Protection
关键词
对旋式局部通风机
噪声
频谱
移频
消声器
contra-rotating auxiliary fan
noise
frequency spectrum
frequency shifting
muffler
