Noise is not a new hazard. It has been a constant threat since the industrial
revolution. Too much noise exposure may cause a temporary change in hearing
(your ears may feel stuffed up) or a temporary ringing in your ears (tinnitus).
These short-term problems usually go away within a few minutes or hours after
leaving the noise. However, repeated exposures to loud noise can lead to
permanent, incurable hearing loss or tinnitus. All expertts recommend removing
hazardous noise from the workplace whenever possible and using hearing
protectors in those situations where dangerous noise exposures have not yet
been controlled or eliminated.

One can follow National Institute for Occupational Safety and Health (NIOSH)
and the work-related hearing loss prevention community on Twitter to stay
connected. Tweets will address information related to occupational noise
control and hearing loss prevention, including safety and health research,
facts and statistics, news and updates, conferences, and publications.

More info

AplusA-online.de - Source: National Institute for Occupational Safety and Health (NIOSH)