Both types of silencers reduce noise by allowing the rapidly expanding gases from the firing of the cartridge to be decelerated and cooled through a series of hollow chambers. The trapped gas exits the suppressor over a longer period of time and at a greatly reduced speed, producing less noise signature.

Why are suppressors so regulated?

Silencers pose a unique risk to public safety and warrant heightened regulation: Silencers are designed to reduce the sound produced when a gun is fired by providing an area for gases to expand and cool before exiting the gun and being released into the air.

How many decibels is a 22 long rifle?

22-caliber rifle can produce noise around 140 dB, while big-bore rifles and pistols can produce sound over 175 dB. Firing guns in a place where sounds can reverberate, or bounce off walls and other structures, can make noises louder and increase the risk of hearing loss.