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。
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.
出处
《噪声与振动控制》
CSCD
北大核心
2007年第3期100-102,共3页
Noise and Vibration Control
关键词
声学
插入损失
吸声降噪量
吸声系数
绕射降噪量
acoustics
insert loss
absorption noise reduction
sound absorption coefficient
diffraction noise reduction
