一种基于近距法(CPX)改进的低噪声路面降噪效果预估方法

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Abstract An improved method was proposed to quantitatively predict the noise reduction performance for low noise pavement, which was based on the CPX (close-proximity method). According to the traffic flow characteristics, the acoustic performance of the pavement and the states of use, the method adopted the principle of sound energy superposition and spatial propagation mechanism of outdoor sound. The prediction accuracy of the proposed method was improved and further demonstrated by testing multiple composite pavement structures. This model can more accurately predict the amount of noise reduction for low noise pavement, especially when the noise level was measured at the border or at a distance of 35m from the road border. An effective way was also provided for predicting and evaluating the noise level of road surfaces when different road lanes have different pavement structures or maintenance states. Results showed that the improved prediction method could reduce the prediction error from 0.8, 1.5 and 1.1dB to 0.2, 0.1 and 0.2dB, respectively for the traffic noise at the border; and it could also reduce the prediction error from 1.1, 1.8 and 1.1 dB to 0.1, 0.2 and 0.2dB, respectively for the noise that is 35m away from the border.

Key words： low noise pavement noise reduction evaluation close-proximity method road/tire noise

Received: 12 May 2021

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X593

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	YUAN Min-min
	LI Ming-liang
	LIU Xiao-fei

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YUAN Min-min,LI Ming-liang,LIU Xiao-fei. An improved noise reduction performance prediction method for low noise pavement based on CPX[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(12): 5943-5952.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I12/5943

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