Suppressors are often mischaracterized in Hollywood. They do not “silence” the sound of a firearm. Instead, they act as mufflers and can reduce the noise of a gunshot to hearing safe levels. Not only do suppressors reduce hearing damage for the shooter, they reduce the noise of ranges located near residential areas.

Source: NRA-ILA | NRA Applauds the Introduction of the Hearing Protection Act, H.R. 367