Iran Occupational Health

  Background and aims 

 contact to noise has harmful effects on operational, Pshychic and physical health. Traffic is of the most important resource of urban environments noises, some of individual differences like extroversion, temper psychoneurosis and sensitivity to noise are the effective factors in effect of noise on function. The goal of this research study of extroversion effect on mental function with traffic noise.

  Methods 

 this study is of interferential type in which traffic noise was recorded by voice recorder sony ICD MX20 in Tehran streets and in was broadcast in laboratory as a sample. The size of sample included 44 persons of students of Medical Science University of Iran elected by accidental sampling method and include 32 samples(23 male, 9 female) and 12 control (7male, 5 female). Regarding to introversion and extroversion are of the effective factors on function. Personality questioneire of eyscenk(EPI) was used. The considered parameters in mental function included total true answers, false answers time average of true answers that were measured by computerized test COG.

  Results

the results indicated that after broadcasing noises, total true answers, was increase in extroversion and males (p= 0/000) while in introversions (p=0/049) and females (p=0/010) after exposing noise, the increase was in the false answers.

  Conclusion

 the results achieved by this research indicated that the traffic noise has the different effects on the parameters of mental function of extroverted and introverted persons., also indicate a meaningful relation between noise and size.