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声屏障吸声作用对绕射降噪量贡献的分析
Analysis of the Contribution Sound Barrier Absorption to the Diffraction
【摘要】 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,只是反映屏障的隔声作用。探讨屏障的吸声性能对绕射降噪量的贡献,并推导出与吸声系数有关的绕射降噪量的公式。
【Abstract】 At present the equation of insert loss hasn’t indicated the effect of absorption,only refers to the effect of sound insulation.In this text,how much the sound barrier absorption contributes to the diffraction will be discussed.The equation of noise reduction due to the absorption will be deduced and added to the total noise reduction.
【关键词】 声学;
插入损失;
吸声降噪量;
吸声系数;
绕射降噪量;
【Key words】 acoustics; insert loss; absorption noise reduction; sound absorption coefficient; diffraction noise reduction;
【Key words】 acoustics; insert loss; absorption noise reduction; sound absorption coefficient; diffraction noise reduction;
- 【文献出处】 噪声与振动控制 ,Noise and Vibration Control , 编辑部邮箱 ,2007年03期
- 【分类号】U491.91
- 【被引频次】26
- 【下载频次】291