2020 Yes https://doi.org/10.1044/2019_AJA-19-0010 Iglehart, Frank North America Experimental Exposure Study Students Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Noise Hearing Cognitive function This study compared speech perception by children with hearing aids in classrooms with different reverberation times; findings support stricter acoustic standards to improve learning outcomes.