采用主被动控制技术的自然通风隔声窗研究

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)。

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

Existing natural ventilation and sound insulation window can’t solve the problem in the low　frequency noise effectively, in this paper, the active control technology is applied in the natural ventilationand sound insulation window, combining with polyurethane sound-absorbing cotton, micro-perforated panel,active control technology is proved in 100-400Hz can reduce noise effectively, the passive control works after 400Hz, and the sound insulation property is equivalent to ordinary window closed state, the outlet noise reduction can reach 32.6 dB (A).