Turbulence caused by train motion, heat radiation and wind eddies destroys the coherent nature of the ground effect. Due to upward refraction, only a certain segment of the track contributes to noise emission. Thus, geometrical spreading and refraction govern the process of noise propagation. Noise generation is modelled by a line source of point sources with dipole directivity.
Influence of refraction and turbulence on railroad noise
Journal of Sound and Vibration ; 210 , 3 ; 367-374
1998
8 Seiten, 17 Quellen
Aufsatz (Zeitschrift)
Englisch
The influence of refraction and turbulence on railroad noise (sv971339)
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