title: Relationship between lighting and noise levels and productivity of the occupants in automotive assembly industry.
abstract: Work environment affects human productivity and his performance. The aims of this study were to investigate the effects of lighting and noise levels on human productivity in the automotive assembly industry.
  
  
  METHODS
  Subjects were 181 workers from different parts of an automobile assembly industry. Illuminance (Lx) at the height of 30 inches from the surface of work station and noise (dBA) were locally measured. Also human productivity by the Goldsmith and Hersey scale (1980) was measured. Data were analyzed by using SPSS v20 Pearson correlation coefficient.
  
  
  RESULTS
  The results showed that the relationship between noise level and human productivity is negative and significant (P < 0.05, r = -0.178), but there was no significant relationship between lighting and human productivity (P > 0.05).
  
  
  CONCLUSIONS
  Based on the results, in assembly tasks, noise has a negative impact on human productivity, and lighting does not affect this. So, in order to increase employee productivity, noise control and reduction to less than the standard values (less than 85 dB) is necessary.
authors.affiliation: Department of Occupational Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran.
authors.forename: Jafar
authors.initials: J
authors.lastname: Akbari
authors.forename: Habibollah
authors.initials: H
authors.lastname: Dehghan
authors.forename: Hiva
authors.initials: H
authors.lastname: Azmoon
authors.forename: Farhad
authors.initials: F
authors.lastname: Forouharmajd
mesh_terms: D000328:Adult; D001336:Automobiles; D003430:Cross-Sectional Studies; D004526:Efficiency; D005260:Female; D006801:Humans; D007221:Industry; D007492:Iran / Q000453:epidemiology; D008029:Lighting / Q000009:adverse effects*; D008297:Male; D009623:Noise, Occupational / Q000009:adverse effects*; D011795:Surveys and Questionnaires; D017132:Workplace