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管道降噪问题一直是迫切需要解决的重大问题.管道噪声中,中高频部分可用传统的无源方法即阻性和抗性消声器来解决.对于低频,阻性消声器的效果很差,如用抗性消声器,则往往又存在几何尺寸的限制问题,此外,阻性和抗性消声器还会引起风道中的压力损失、降低风速、减小风量.而有源消声对低频噪声的效果非常好,而且体积小、安装和更新容易、几乎不会造成气流的压力损失.所以,有源消声在通风、空调管道的噪声治理中有着广阔的应用前景.
Pipeline noise reduction has been an urgent need to address the major issues.Pipe noise, the high frequency part of the traditional passive methods that can be used to solve the resistive and muffler.For low-frequency, resistive muffler is poor, such as the use of anti- In addition, the resistive and resistive muffler can also cause the pressure loss in the air duct, reduce the wind speed and reduce the air volume, while the active muffler has a very good effect on the low-frequency noise, And small size, easy to install and update, almost no pressure loss caused by the air flow, so the active noise reduction in ventilation, air conditioning pipe noise control has broad application prospects.