采用主被动控制技术的自然通风隔声窗研究

Natural Ventilation and Sound Insulation Windows Based on Active and Passive Control

现有自然通风隔声窗无法有效解决中低频噪声问题,将有源控制技术应用于自然通风隔声窗上,结合聚氨酯吸声棉、微穿孔板,验证了主被动控制系统分别在100 Hz^400 Hz,400 Hz以上范围内可以有效降噪,且整窗隔声性能等同于普通窗全关状态,并在出风口降噪量可以达到32.6 dB(A)。

The existing natural ventilation and sound insulation windows are unlikely to solve the problem of lowfrequencynoise effectively. In this paper, the active control technology is applied to the natural ventilation and the soundinsulation windows. The polyurethane sound- absorbing cotton and micro- perforation panel are used. It is proved that theactive control technology can effectively reduce the noise in 100 Hz-400 Hz frequency range, the passive control works wellin the frequency range above 400 Hz, the sound insulation performance of the sound insulation window is nearly the same asthat of closed window, and the noise at the outlet is reduced by 32.6 dB （A）.