Efficient Calculation of the Three-Dimensional Sound Pressure Field Around a Noise Barrier

Road traffic noise prediction model ``ASJ RTN-Model 2013'': Report of the Research Committee on Road Traffic Noise

“…A4.2) is referred to as a ''2.5-dimensional sound field.'' The complex sound pressure at the receiving point P in the 2.5-dimensional sound field, 0 3D ðx; y; z; kÞ, is related to the complex sound pressure 0 2D ðx; y; k 2D Þ in a two-dimensional field, to which the cross-sectional shape of the 2.5-dimensional sound field is modeled, using the following equation [92,93].…”

Sensitivities of outdoor sound propagation predictions to environmental input parameters

“…The last term P ␣ is a corrective factor which takes into account the ground admittance. Duhamel 13 and Jean et al 14 have presented a way to compute the pressure field of a line source by post-processing 2D results. Using the representation of a 3D point source in terms of integral Hankel functions, they show it is possible to approximate pressure field in 3D from 2D pressure results.…”

Investigation for insertion loss of noise barrier for sound source moving at high speed

“…In the numeric forecasting of railway noise etc., a method [3] that obtains the solution to a three-dimensional sound field by using integration to convert the basic solution found with the boundary element method in a two-dimensional space and applications of that method [4,5] have been reported. This time, this method was applied to the study of the insertion loss for an noise barrier for a moving sound source and the influence of the change in frequency modulation and orientation due to the Doppler effect on the noise barrier insertion loss was studied.…”