Train-Induced Fluctuating Pressure and Resultant Dynamic Response of Semienclosed Sound Barriers

Table 2

The first 10 modes of natural frequencies.

Mode	Frequency (Hz)	Mode	Frequency (Hz)
1^st	3.25	6th	4.56
2ed	3.74	7th	4.63
3th	4.00	8th	4.68
4^th	4.27	9th	4.71
5^th	4.46	10th	4.75