2016 No https://doi.org/10.1044/2016_AJSLP-14-0191 Cutiva, Lady Catherine Cantor South America Epidemiology Study Staff Teachers Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Noise Other In a yearlong follow-up of 682 Colombian school staff, self-reported noise levels and poor classroom acoustics were linked to both incident and chronic voice complaints. Objective and subjective data underline the role of environmental factors in educator vocal health.