2016 No https://doi.org/10.1007/s00420-015-1077-3 Kristiansen, Jesper Europe Experimental Observational Teachers Elementary (K-5) Middle/Jr High (6-8) Noise Other Classroom acoustics Well-being Intervention Acoustical working environment Noise exposure Extra-auditory effects of noise exposure Intervention study in 2 schools measured RT, activity noise, and surveyed 102 teachers. Acoustic upgrades reduced noise exposure and equipment disturbance.