Khamchatra, A., Thanakitpairin , A. and Potipat, J. 2021. EVALUATION OF NOISE LEVEL AND NOISE – INDUCED HEARING LOSS OF WORKERS AT STEEL STRUCTURE MAINTENANCE FACTORY. Life Sciences and Environment Journal. 22, 2 (Sep. 2021), 128–136. DOI:https://doi.org/10.14456/lsej.2021.1.