Long periods of high noise of or above 90 dB, especially if it is a high-frequency sound, can damage sensitive hair cells that cover the cochlea, the deepest part of the ear. The consequence of this is the certain degree of deafness, and the term for that is professional deafness. Occupations that are particularly dangerous for unprotected ears include work at the boiler plant, driving a tractor, handling a pneumatic hammer, and playing in a loud rock band (or even listening to such music).
What to do?
Perceptive deafness, caused by the damage on cochlea, is the irreversible process. Therefore, prevention is essential. If you are exposed to dangerous levels of noise, you must wear suitable hearing protection.
If you are working in a very loud environment, go to your doctor regularly for hearing tests. Hearing loss can be detected at the initial stage, so take measures to prevent further exposure to the noise that causes it. If you feel that the noise level in your working environment is too high and that it is likely to endanger your health, contact your Safety Officer and ask to measure the noise level.