Alimohammadi I, Sandrock S, Gohari MR. Occupational Health Research Center, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran, i-alimohammadi@tums.ac.ir. Low frequency noise (LFN) as background noise in urban and work environments is emitted from many artificial sources such as road vehicles, aircraft, and air movement machinery including wind turbines, compressors, and ventilation or air conditioning units. In addition to objective effects, LFN could also cause noise annoyance and influence mental performance; however, there are no homogenous findings regarding . . .