摘要
The World Health Organization(WHO)released the World Report on Hearing on March 2,2021.The WHO estimated that by 2050,nearly 2.5 billion(1 in 4 people)would be living with some degree of hearing loss,and at least 700 million of whom would require rehabilitation services(1).The risk factors that cause hearing loss not only include occupational but also non-occupational factors,such as,high-level exposure of noise and ototoxic chemicals at workplaces,age.
