Experimental Study of Environmental Noise from Metro Train
In order to study noise emitted by metro train, the experiment is carried out in the test line of Shenzhen Metro Line 1. It can be concluded that the noise outside the metro train is mainly middle and low frequency; the higher the train speed is, the larger the noise is; In static condition, the higher the measuring point is, the larger the noise is while in constant speed condition the higher the measuring point is, the smaller the noise is.
Chaohe Chen, Yong Huang and Guangfan Li
D. T. Li et al., "Experimental Study of Environmental Noise from Metro Train", Advanced Materials Research, Vols. 243-249, pp. 3440-3444, 2011