참고 문헌
Fink, D. J. (2017). What Is a Safe Noise Level for the Public? *American Journal of Public Health, 107*(1), 44–45. https://doi.org/10.2105/AJPH.2016.303527

Lutman, M. E. (2000). What is the risk of noise-induced hearing loss at 80, 85, 90 dB(A) and above? *Occupational Medicine (London), 50*(4), 274–275. https://doi.org/10.1093/occmed/50.4.274