Gun Silencer Theory

Paper Summary:

This paper examines the physics behind gun silencers, whose task it is is to take an explosive discharge of hot gases, which is the result of a controlled explosion in a tiny space, and eliminate the sound. It provides a brief biography of Hiram Maxim, the inventor of the machine gun, gas motor, mouse trap, and the first firearm silencer / noise suppressor, and the history of the development of the silencer over the years. It also discusses the dynamics of the gasses created in the explosion and evaluates the dynamics of an effective gun silencer design.

Outline
Sound Dynamics
Gas Dynamics
Gun Silencer Design
Disclaimer

From the Paper:

"The explosion which is caused by igniting the powder in a fire arm munitions creates not only compressed air waves, and thus sound, but the explosion also introduces an additional volume of gas into the gun barrel which must also be diminished if the silencer is to effectively muzzle the sound. The gases take up volume in the barrel, increasing the speed at which the air travels. The additional gases also compress the air. So the explosion contributed to the sound in both of the ways described in the table above. In order to counteract these forces, the gas volume, and the compression level of the gasses must both be diminished."

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