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据“芝加哥论坛”载文,休斯敦大学的研究人员加里。库普曼发现了一种降低噪声的方法。库普曼针对柏林石头路面街道中清洁车噪声经常吵醒居民问题,给清洁车又增加了一种噪声:他在清洁车的风机壳部安装了一个共鸣柱,当气流通过时就会发出如风吹瓶口似的音响。然后调谐共鸣柱的声音,使之与清洁车噪声呈不协调的组合,从而取得了降低总噪声的效果。库普曼还计划采用同样的方法降低俄克拉何马一家电厂的风机噪声。
According to the “Chicago Tribune” paper, University of Houston researcher Gary. Koopman found a way to reduce noise. Kupperman frequently woke residents with street noise in the stone-paved street in Berlin, adding another noise to the car: he installed a resonance column in the car’s fan housing to give out air when it passes Such as the wind blowing bottle-like sound. Then tuning the sound of the resonance column to make it uncoordinated with the noise of the cleaning vehicle, thus achieving the effect of reducing the total noise. Koopman also plans to use the same method to reduce fan noise at a power plant in Oklahoma.