Introduction: Low frequency sound is one of the most important sources of sound in the environment. Some individual differences such as extraversion, neuroticism, and sound sensitivity are factors that influence the effect of sound on cognitive functions. The purpose of this study was to investigate the effect of personality type (introversion/extraversion) on cognitive Performances in the presence of low frequency noise.Methods: This is an interventional study. The study population was Hamadan University of Medical Sciences students. 120 of them were selected through purposeful sampling (60 extraversion and 60 introverted) and entered the study. By simulating the real environment of each person, they were exposed to 50, 60 and 70 dB for 40 minutes. During the encounter, the cognitive Performances of the subjects were examined using the integrated visual auditory continuous performance test. Data were analyzed using SPSS20 software, independent t-test and ANOVA.

Results: The results showed that low frequency noise negatively affects the components of cognitive Performances and decreases from 50 to 70 dB with increasing noise pressure (p <0.05). The study of the effect of personality type (introversion / extraversion) and gender showed that cognitive Performances were more affected in introversion and women (p <0.05).Conclusion: The results of this study showed that the noise pressure level of the low frequency noise has different effects on the parameters of the cognitive Performances of extrovert and introverted individuals, and this negative effect on introverts is lower than the low frequency noise.