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2 Mayer, Melissa. “What Is the Decibel Level of a Jet Plane?” Sciencing. May 9, 2018. Accessed on July 19, 2022. https://sciencing.com/decibel-level-jet-plane-5375252.html
3 Lie, Arve, Marit Skogstad, Torstein Seip Johnsen, Bo Engdahl, Kristian Tambs. “Noise-induced hearing loss in longitudinal study of Norwegian railway workers.” National Library of Medicine. September 1, 2016. Accessed on July 19, 2022. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5020756/
4 Ellsworth, Spencer. “Heavy Construction Equipment Noise Study Using Dosimetry and Time-Motion Studies.” National Institute for Occupational Safety and Health. Accessed on July 19, 2022. https://www.cdc.gov/niosh/mining/UserFiles/works/pdfs/hcensu.pdf
5 “Noise and Music Facts (A Warning).” International Noise Awareness Day. Accessed on July 19, 2022. https://noiseawareness.org/info-center/noise-music-facts/
6 “Common Noise Levels.” Progressive Agriculture. Accessed on July 19, 2022. https://www.progressiveag.org/uploads/documents/noise_graphs.pdf
7 “20 High Volume Jobs with Risk of Hearing Loss.” Bloom Hearing Specialists. Accessed on July 19, 2022. https://bloomhearing.com/hearing-tips/20-high-volume-jobs-with-a-risk-of-hearing-loss/