| 声屏障对交通噪声的A计权声插入损失 |
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| 引用本文： | 章力,郑长聚.声屏障对交通噪声的A计权声插入损失[J].同济大学学报(自然科学版),1989,17(2):265-271. |
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| 作者姓名： | 章力 郑长聚 |
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| 作者单位： | 同济大学声学研究所，同济大学声学研究所 |
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| 摘 要： | 本文提出了对一宽带噪声,声屏障的A计权声级插入损失△LA在一定误差范围内可用某一特定频率f_e时的声插入损失△L值来代替,对于我国道路交通噪声的频谱可定出f_e为400Hz,误差范围小于1dB,并由交通噪声的线声源模型,得到了无限长屏障对于交通噪声的声插入损失的计算公式。
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| 关 键 词： | 屏障 交通噪声 隔声量 等效频率 |
A-weighted Insertion Loss of a Screen against Traffic Noise |
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| Zhang Li Zheng Changju Institute of Acoustics.A-weighted Insertion Loss of a Screen against Traffic Noise[J].Journal of Tongji University(Natural Science),1989,17(2):265-271. |
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| Authors: | Zhang Li Zheng Changju Institute of Acoustics |
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| Institution: | Zhang Li Zheng Changju Institute of Acoustics |
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| Abstract: | The A-weighted insertion loss L_A of a screen for a wide band noise can be equivalent to L of the insertion loss at a specific frequency within a cer-tain error. In situation of the traffic noise in China, it shows that equivalent frequency fe is equal to 400 Hz and the maximum error is less than 1 dB. A formula of A-weighted insertion loss provided by an infinite long screen against the road traffic noise which is regarded as a line source is also obtained. |
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| Keywords: | Screen Traffic noise Acoustic insulation mass Equivalent-Frequency |
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