高速公路共振腔吸声砖声屏障降噪效果

Noise reduction effect of noise barrier made of sound-absorbed bricks with resonance cavities along expressway

为解决交通噪声对高速公路两侧村庄声环境影响问题，根据已建成公路交通噪声监测结果，给出高速公路交通噪声预测模型，对两侧声环境敏感点的交通噪声级进行计算，提出公路两侧分布村庄段采用双侧共振腔吸声砖吸声型声屏障降噪方法。声屏障工程实例及降噪监测结果表明，共振腔吸声砖声屏障降噪量达13～16dB，具有构造简单，施工方便，造价低等特点，环境效益和经济效益比较显著。

In order to solve the problem of acoustic environment impact resulted from traffic noise on the villages along expressway, the traffic noise of constructed expressway was monitored, a forecasting model of traffic noise was given to calculate the traffic noise levels, and a noise reduction method was proposed, that noise barrier was made of sound-absorbed bricks with resonance cavities on both sides of expressway. result indicate that the method is feasible, the Noise barrier engineering and noise monitoring noise level is decreased by 13- 16 dB, the structure of the barrier is simple, its cost is low, its construction is easy, and its environment and economic benefits are obvious. 2 tabs, 5 figs, 12 refs.