Definition of an On-Board Comfort Index (Rail) for the Railway Transport

Table 1

Preliminary sample survey results to detect the perceived noise level.

Leq () [dB]	Noise perceived
	1		2		3		4		5
	Number	%	Number	%	Number	%	Number	%	Number	%
65	247	98.8	2	0.8	1	0.4	0	0.0	0	0.0
70	241	96.4	6	2.4	3	1.2	0	0.0	0	0.0
75	32	12.8	164	65.6	21	8.4	33	13.2	0	0.0
80	7	2.8	41	16.4	135	54.0	46	18.4	21	8.4
85	0	0.0	0	0.0	2	0.8	3	1.2	245	98.0
90	0	0.0	0	0.0	1	0.4	3	1.2	246	98.4
95	0	0.0	0	0.0	0	0.0	0	0.0	250	100.0
100	0	0.0	0	0.0	0	0.0	1	0.4	249	99.6