摘要
干涉型声屏障基于声波干涉消声原理并依据铁路噪声源特点设计制造而成。声学模型试验测试结果表明,干涉装置的降噪作用主要体现在位于声影区和亮区之间的过渡区域(亦称灰色区域),干涉装置附加降噪效果为3.0～5.6dB,与同高度的直立形声屏障相比,降噪效果提高2.0～3.2dB。与其它顶部吸声体相比,干涉型声屏障更适宜于控制铁路噪声。因此,在铁路噪声控制工程中具有良好的应用前景。
Bas d on the principle of interference of sound wave and the characteristic of railway noise source, the structure of interference sound barrier was studied. The Acoustical model experiment test result indicated that： the function of noise reduction of the interference noise reduction system is mainly located in transition region, the noise reduction effect of the interference noise reduction system is 3.0 - 5.6 dB, compared with the same altitude erect sound barrier, the noise reduction effect enhances 2.0 - 3.2 dB. Compared with other sound absorption bodies on the top of sound barrier, the interference sound barrier is suitable to control the railway noise. Therefore, it has good application prospect in the railway noise control project.
出处
《铁道劳动安全卫生与环保》
2007年第5期205-208,共4页
Railway Occupational Safety Health & Environmental Protection
关键词
铁路噪声
噪声控制
声屏障
railway noise
noise control
sound barrier
