Test and Analysis for Environmental Noise of an Integrated Transport Hub

The comfort of workers and passengers is directly affected by the level of environmental noise in integrated transport hub, which is also critical to the sustainable development of railway station areas. Sound pressure level (SPL) of different structural layers were measured in an integrated transport hub, and then analyzed in time domain and frequency domain. The impact of different types of trains and subway's entering and leaving the station on the environmental noise of the platform layer and waiting hall were studied. Research conclusions are as follows: (1) the equivalent SPL on the platform is 65.4 dBA-70.2 dBA. And the equivalent SPL in the waiting hall is 72.8 dBA in the rush hour, which is 4.6 dBA higher than that in the flat peak time. The measured noise level is higher than the comfort limits in the range of 40-200 Hz. (2) The maximum and response time of SPL on the platform caused by different types of trains' entering and leaving the station is various. However, the dominant noise frequencies are 400-2,500 Hz. (3) During the trains' braking to enter the station, the low-frequency noise responses of the platform and the waiting hall remain unchanged basically, and the noise response in a higher frequency range rapidly increases, which was caused by the collision between the wheel and rail, braking, etc. The equivalent A sound level for the platform layer is 73.8 dBA, and the waiting hall is 75.3 dBA. (4) As the distance between the key point of the platform and the track centerline increases, the noise response exhibits logarithmic attenuation.