1 World Health Organization - “Deafness and hearing loss”: https://www.who.int/news-room/fact-sheets/detail/deafness-and-hearing-loss
2 My Hearing Center - “Stress Could Lead to Hearing Loss”: https://myhearingcenters.com/blog/stress-could-lead-to-hearing-loss/
3美國約翰霍普金斯大學醫學院研究報告: https://www.hopkinsmedicine.org/health/wellness-and-prevention/the-hidden-risks-of-hearing-loss