Noise-induced Hearing Loss(NIHL) is caused by being around loud noises.
If you have worked being around loud noises over 3 years and felt uncomfortable with hearing, the hearing loss might be NIHL and might be judged as industrial accident. (Korea Workers’ Compensation & Welfare Service compensates the worker for industrial accident)
Examples of occupation NIHL can develope are..
Miners
Metal workers
Welders
Construction workers
Stone masons
Steel mill workers
Shipbuilding company workers
Hand breaker workers, etc