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- W577156767 abstract "Double-decker road structures are seen in metropolitan cities, because road space can be effectively increased. In order to assess the noise from traffic on these structures, an efficient prediction method of road traffic noise containing multi-reflective noise is required. We have already proposed a numerical prediction method for this purpose using the Monte Carlo simulation (MCS) in our previous papers. The MCS is highly suitable for calculating the values of equivalent continuous A-weighted sound pressure level, because it enables easy simulation of the direct transmission of multi-reflection waves. However, the MCS is based on geometrical acoustics, and it is difficult to compute the diffracted transmission of multi-reflection waves. Therefore, when the space between the bottom of the girder supporting an upper road and the top of the noise barrier on the underlying planar road is small, the numerical errors of sound pressure level computed using the MCS increase. To overcome this drawback, the boundary element method (BEM) based on wave equations is applied for prediction of road traffic noise. For the covering abstract see IRRD E104312." @default.
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- W577156767 date "1999-01-01" @default.
- W577156767 modified "2023-09-26" @default.
- W577156767 title "A PREDICTION METHOD OF ROAD TRAFFIC NOISE BY THE BOUNDARY ELEMENT METHOD ALONG ELEVATED TRACKS" @default.
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