| 王素文,张松光,王淑萍,文衍广,郭曙光,陈鸿适,陶建成,邱小军.虚拟声屏障在变压器低频降噪中的实验研究[J].,2015,34(6):487-494 |
| 虚拟声屏障在变压器低频降噪中的实验研究 |
| Experimental study of applying a virtual sound barrier to reduce low-frequency noise of transformers |
| 投稿时间：2015-02-17 修订日期：2015-11-02 |
| 中文摘要: |
| 针对开口房间内的变压器,在开口处布放若干扬声器和误差传声器构成虚拟声屏障,实验研究了虚拟声屏障对通过开口向外辐射的低频线谱噪声的控制效果。将15个次级源近似均匀分布在面积为2 m′ 2.7 m的开口面上,左右间距约58.5 cm、上下间距45-65 cm,15个误差传声器分别位于对应的次级源正前方1 m,系统采用自适应谐波降噪算法。结果表明：虚拟声屏障系统在误差点100 Hz、200 Hz和300 Hz的平均降噪量分别达到12.7 dB、19.9 dB和22.2 dB,虚拟声屏障对100 Hz、200 Hz、300 Hz线谱噪声的控制效果与单层封闭窗户相当,且内部合成参考信号,无需外接参考传声器。采用虚拟声屏障对开口房间内的变压器降噪的好处是实现室内外的自然通风,便于变压器的散热。 |
| 英文摘要: |
| A virtual sound barrier composed of loudspeakers and error microphones is implemented at the opening of a building to reduce the transformer noise. The control performance of the low-frequency noise radiated outside through the opening is investigated by experiments. In the experiments, 15 loudspeakers are approximately evenly distributed on the opening of which the size is 2 m′2.7 m, with a horizontal distance of 58.5 cm and a vertical distance of 45-65 cm, and the error microphones are 1 m in front of the corresponding secondary sources. The waveform synthesis algorithm is applied in the system. The experiments show that the average noise reduction caused by the virtual sound barrier system at the error points is 12.7 dB for 100 Hz, 19.9 dB for 200 Hz and 22.2 dB for 300 Hz. The performance of the virtual sound barrier and the windows are almost the same, and the reference signal is internally synthesized, so no external reference microphone is needed here. The advantage of developing such a virtual sound barrier system to reduce transformer noise is that it helps the ventilation of the building and the heat dissipation of the transformers. |
| DOI： |
| 中文关键词: 开口房间,虚拟声屏障,变压器,低频噪声 |
| 英文关键词: Open buildings, Virtual sound barrier, Transformer, Low-frequency noise |
| 基金项目:(11104141、11474163) |
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| 摘要点击次数: 2513 |
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