"Suppressors, also known as silencers, are the hearing protection of the 21st century sportsman. Despite common misconceptions, suppressors are not silent. They are simply mufflers for firearms, which function by trapping the expanding gasses at the muzzle and allowing them to slowly cool. Suppressors are regulated under the National Firearms Act (NFA) of 1934, which falls under the purview of the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF)."
Typically, hunters do not wear ear protection because we NEED to hear our surroundings; however, this can cause hearing damage over time. "Suppressors allow hunters to maintain full situational awareness, while still protecting their hearing. The result is a safer hunting experience for the hunter, and for those nearby."
For more infotrmation including how to purchase or posses a suppressor and the benefits of suppressors... visit The American Suppressor Association.