2021 Yes https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9126126/ Gustafson, Samatha North America Observational Epidemiology Study Students Elementary (K-5) Noise Hearing In 79 U.S. children aged 6–12, perceived listening difficulty—but not measured classroom noise—predicted self-reported fatigue. Supports need for subjective listening supports in school policy.