Research on Noise Source Intensity Testing of Environmental Control Equipment in Underground Rail Transit Stations
To study the noise source intensity characteristics of urban rail transit environmental control e-quipment,multiple environmental control equipment such as fresh air pavilions,exhaust pavilions,piston air pavilions,and cooling towers in the Yangtze River Delta region were selected for noise level and frequency spectrum testing.The test results show that cooling tower noise source intensity＞multi unit noise source inten-sity＞piston air booth noise source intensity＞exhaust air booth noise source intensity＞fresh air booth noise source intensity.The noise spectrum of different types of environmental control equipment shows broadband characteristics,and the main frequency range of each type of wind pavilion and multi unit covers 315 Hz～2000 Hz,with broadband peaks between 630 Hz～800 Hz.The noise frequency band of the cooling tower cov-ers 500 Hz～2 500 Hz,and the peak sound pressure level is around 1 600 Hz.The purpose of this test is to provide certain data support for noise prediction and noise reduction design of environmental control equip-ment in underground rail transit stations.
rail transitenvironmental control equipmentnoise source intensityactual measurement
万方数据
维普
