The members of the military who are most at risk of hearing loss are usually those who are most often exposed to several kinds of high-impact noises, often in conflict areas. Noises caused by explosives, weaponry, or the loud engines of helicopters, tanks, or other vehicles can all be possible threats to hearing. Even when wearing the 3M earplugs, the defective plugs do not afford sufficient protection, and a member of the military could be susceptible to the sudden loss of hearing in such scenarios.