RT - Journal Article T1 - Evaluation of noise pollution and acoustic comfort in the classrooms of Hamadan University of medical sciences in 2012 JF - Iran-J-Ergon YR - 2013 JO - Iran-J-Ergon VO - 1 IS - 2 UR - http://journal.iehfs.ir/article-1-43-en.html SP - 19 EP - 27 K1 - Acoustical comfort K1 - Classroom K1 - Speech intelligibility K1 - Noise pollution AB - Introduction: Noise pollution cause mental fatigue, concentration disturbance and learning loss in students during the training activities. This study aims to evaluate Noise pollution and the level of acoustical comfort in typical classrooms, and present treatment methods for improving acoustic comfort. Method: In cross sectional study, twenty classrooms in the seven faculty of Hamadan University of medical sciences, were studied using questionnaire with reliability coefficient equal to 0.8 was completed among 413 students. Measurement of noise level was performed using sound level meter (model TES-1358) according ANSI S12.6 in classrooms. Result : The results showed the background noise level and outdoor noise level were equal 46.97 ± 3 dB(A), and 57.16 ± 4.8 dB(A) , respectively. The background noise was higher than the recommended limit equal to 45 dB(A) (P LA eng UL http://journal.iehfs.ir/article-1-43-en.html M3 ER -