Arteaga Rojas, L. M. . (2019). Characterization of noise levels in two classrooms of the Universidad Pedagógica Nacional: isolation conditions, reverberation time and speech intelligibility. I+ T+ C- Research, Technology and Science, 1(13), 50–59. Retrieved from https://revistas.unicomfacauca.edu.co/ojs/index.php/itc/article/view/itc2019_pag_50_59