An Experimental Investigation into the Difference in the External Noise Behavior of a High-Speed Train between Viaduct and Embankment Sections

Table 2

Definitions of noise source regions of the train.

No.	Region	Vertical direction (m)		Longitudinal direction (m)
1	Lower parts	0	1.5	0	212
2	Body	1.5	4.0	3	212
3	Roof	4.0	4.2	6.0	206
4	Pantograph	3.7	6.0	3.0 m before the maximum sound intensity point	3.0 m after the maximum sound intensity point
5	Bogie	0	1.5	2.5 m from the bogie center to the front and back