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. The best approach is to remove 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. For more information about noise and its control, go to http://www.cdc.gov/niosh/topics/noise/ . This is clipped from the 1965 US Department of Defense (DOD) film, Man and Safety -- Supervision. The film discusses supervision and its role in human error accidents. The film points out that supervision ranges from top executives to individuals working alone and that all levels are of equal importance. It delineates the responsibility of a supervisor in attaining goals, assigning and monitoring tasks, delegating authority and understanding subordinates basic needs. The film dramatizes several accidents to show the consequences of poor supervision and illustrates the role of positive supervision in preventing major mishaps. The entire film is available at the Internet Archive.