Silence, please !

For any fans of Call of Duty (or for anyone who is interested in acoustics and sound), this post is for you.

If you have played Call of Duty : Modern Warfare 2 or the new instalments of the popular first-person shooter gaming franchise, you must have come across an attachment to your primary weapon known as a “silencer” or a suppressor.

Figure 1 : Call of Duty : Advanced Warfare suppressor attachment

Figure 1 : Call of Duty : Advanced Warfare suppressor attachment [1]

Now, in the game what this does is that it hides the location of you on the enemy mini-map at the time of firing. But what is the theory behind this? The infographic given below might explain this :

Figure : Gun silencer

Figure 2 : Gun silencer in action

When a gun is fired, superheated and pressurized gases are produced. When these gases escape into the air, the dramatic change in environment causes the loud sound of a gun blast. Silencers help to make this transition more gradual for the gases. Baffles and expansion chambers can be found inside the suppressor, which aid in efficient funnelling, cooling, and spreading out the gases to reduce the level of noise emitted (below the 140dB safe-hearing level) once they are released to the atmosphere. “Other benefits of a silencer include reduced recoil, better accuracy, smaller muzzle flash, and less damage to nearby ears” [2].

References :

[1] Advanced Warfare: 25+ Weapon Attachments & Benefits! (Call of Duty: Advanced Warfare) – YouTube. 2015. Advanced Warfare: 25+ Weapon Attachments & Benefits! (Call of Duty: Advanced Warfare) – YouTube. [ONLINE] Available at: https://www.youtube.com/watch?v=7sy95bX8D5g. [Accessed 02 July 2015].

[2] Silencers, how do they work? | Science! | Geek.com. 2015. Silencers, how do they work? | Science! | Geek.com. [ONLINE] Available at: http://www.geek.com/science/silencers-how-do-they-work-1617138/. [Accessed 02 July 2015].

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