title: [Comfort of crew and passengers and atmospheric pressure, noise, wind speed in high-speed train of Shijiazhuang-Taiyuan passenger dedicated line].
abstract: OBJECTIVE
  To explore the crew and passengers' comfort on the Shijiazhuang-Taiyuan passenger dedicated line and physical factors, such as air pressure, noise, wind speed.
  
  
  METHODS
  Comfort investigation of all the crew (n = 244) and passengers (n = 377) on the Shijiazhuang-Taiyuan passenger dedicated line at speed of 250 km/h and 200 km/h and the detection of the air pressure, noise and wind speed were performed in 2011.
  
  
  RESULTS
  Significantly higher ratio of comfortable feeling, lower ratio of seriously discomfortable feeling were observed in crew and passengers at 200 km/h compared with those at 250 km/h (P < 0.05), as well as rapid disappearance of discomfortable feeling in crew (P < 0.05) and significantly higher ratio of lightly discomfortable feeling and lower ratios of tinnitus and eardrum discomfort induced by air pressure and noise in passengers at 200 km/h. No significant difference was observed in ear discomfort induced by air pressure and noise among crew, and the duration of disappearance of discomfortable feeling among passengers between 200 km/h and 250 km/h. The noise in carriages exceeded the related standard when the high-speed train passing through the tunnels.
  
  
  CONCLUSIONS
  The individuals feel more comfortable at 200 km/h than 250 km/h in this line., which may be related with rapid variation of wind speed and noise when the train passes through the tunnels with high speed.
authors.affiliation: Shijiazhuang Health and Epidemic Prevention Station of Beijing Railway Bureau, Shijiazhuang 050000, China.
authors.forename: Yi-biao
authors.initials: YB
authors.lastname: Zhai
authors.forename: Wei
authors.initials: W
authors.lastname: Huo
authors.forename: Qiao-ying
authors.initials: QY
authors.lastname: Liu
authors.forename: Bao-shan
authors.initials: BS
authors.lastname: Chen
authors.forename: Jin-long
authors.initials: JL
authors.lastname: Zhang
authors.forename: Lei
authors.initials: L
authors.lastname: Shi
mesh_terms: D000293:Adolescent; D000328:Adult; D001274:Atmospheric Pressure; D005260:Female; D006801:Humans; D008297:Male; D009623:Noise, Occupational; D009624:Noise, Transportation; D016272:Occupational Health; D011890:Railroads; D012677:Sensation; D011795:Surveys and Questionnaires; D014919:Wind; D017132:Workplace; D055815:Young Adult