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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 window can not effectively solve the problem of low and middle frequency noise. The active control technology is applied to the natural ventilation and sound insulation window. Combined with polyurethane sound absorption cotton and micro perforated plate, the active and passive control systems are validated at 100 Hz ~ 400 Hz, 400 Hz and above can effectively reduce noise, and the whole window sound insulation performance is equivalent to the normal state of the whole window, and the amount of noise reduction at the outlet can reach 32.6 dB (A).