The study of active noise barrier is in the initial stage.
有源声屏障尚处于初始阶段，许多基本问题尚未得到解决，本文用数值模拟的手段分析了有源声屏障的有源控制效果与次级声源的个数、观测点的位置以及噪声频率等因素的关系；通过分析屏障上边缘声场分布特征，对有源控制作用机理作出了定性的解释。
The Extra Insertion Loss of Active Noise Barrier with Multiple-frequency Components;
有源声屏障对宽频带白噪声的新增插入损失
profiled concrete barrier
有图案的混凝土隔声屏障
Response of Noise Barrier for Existing Railway Bridges under Impulsive Pressure Induced by High-Speed Train
既有铁路桥梁声屏障的高速列车脉动风致响应
barrier correction
屏障的隔声修正数值
correction for the effect of barrier
屏障的隔声修正系数
If equipped, install sound bar.
如果配备，安装声音屏障。
Research on the Acoustic Characteristics and Acoustic Considerations of Noise-barrier;
道路声屏障声学特性与声学设计研究
Examples of Urban road noise Barrier effects And Full-closed barrier's outlook
城市道路声屏障实例及全封闭屏障的展望
Acoustic Performance Analysis and Structure Desigh of Noise Barrier;
声屏障的声学性能分析及其结构设计
Research on Acoustical and Landscape Design of High-speed Railway Noise Barriers
高速铁路声屏障声学与景观设计研究
Noise Reduction for Sound Barrier in Railway Passenger Dedicated Lines
铁路客运专线吸声式声屏障降噪研究
At present the equation of insert loss hasn't indicated the effect of absorption, only refers to the effect of sound insulation.
目前对声屏障的插入损失计算所用的公式，没有体现材料吸声对绕射声衰减的作用。
noise barrier reserve
预留作为设置隔声屏障的土地
Research on Noise Barrier Engineering Supervision in Freeway Construction Phase;
高速公路施工期声屏障工程监理研究
Study on Road Barrier with Different Top Shapes
道路交通声屏障顶端结构的设计研究
Review Assessment on Highway Noise Barriers of Sichuan Province
四川省高速公路声屏障工程回顾评价
The Model Experiment and Acoustic Characteristic Study on Noise Barrier;
降噪声屏障的模型试验和声学特性研究
Analysis of Noise Reduction Efficiencies of Straight-type and Incline-type Absorbing Sound Barriers Along Railway
铁路直立型与内倾型吸声声屏障降噪效果分析