摘要
如何消除气流的影响是管道有源降噪的难点之一．本文分析了湍流对有源降噪系统的影响，并开发了一种抗湍流传声器探管．最后在某种通风系统的进气管段进行了降噪试验，气流速度为20m／s时，在60－630Hz频带取得了15dB（A）的降噪效果．
How to eliminate the effect of air flow is one of difficulties in attenuating noise in ducts by means of the active method. In this paper, the influence fo turbulent flow on an active attenuator in a duct is analyzed and an anti-turbulence microphone probe is developed. Finally, experiment are made on the intake duct of an ventilating system. The results show that when flow velocity in the duct is 20m/s, 15dB(A) reduction of sound pressure level can be achieved in the 60-630Hz frequency band.
出处
《应用声学》
CSCD
1995年第1期13-18,共6页
Journal of Applied Acoustics
关键词
有源噪声控制
管道
气流
Active noise control, Duct, Air flow
