Main parameters of indoor environmental in terms of noise could influence people health, fettle and ability to work. Therefore proper noise level is strongly important. The research was conducted in a didactic buildings – University of Technology located in Białystok, north-eastern Poland and education buildings the Warsaw University of Life Sciences, Faculty Civil Engineering and Environmental Engineering located in center Poland. Research was devoted to issues related to the noise level in a classrooms of university during the didactic classes. In all rooms of both universities, during working days average noise level was under 40 dB. These values are in accordance with standards. Outside the buildings, the sound level was in the range of 30-35 dB. These values also comply with the guidelines.