If you work in the military or law enforcement, getting exposed to the noise of gunshots and artillery shots is a fact of life. Unfortunately, this “fact of life” can lead to hearing loss in the long run —and even right away, depending on where you're stationed. The American Speech Language Hearing Association points out that exposure to 140 dB which is less that almost all firearms can result in permanent hearing damage.
Reduce Harmful Noise While Maintaining Sound Directionality
To prevent this from happening, you should wear noise attenuating hearing protectors like the Earmonix Shooting Earplugs. They are specially designed to protect the wearer from the noise made by gunshots, explosions, and artillery shots. These ear plugs are designed for outdoor shooting and if used for indoor shooting ranges double protection is always recommended.
The Earmonix Shooting Earplugs are specially designed to protect your ears while still allowing you to hear what's going on in your environment. Retaining sound spatiality and directionality are critical in military and law enforcement work to maintain alertness. When there is no high-impulse noise present they provide a NRR rated 12dB of continuous protection allowing you to hear background noise as well as the voices of the people around you. However with loud sound bursts such as firearms or explosions their specially designed reactive filters can provide up to 33dB of attenuation reducing dangerous sounds to a safe level. 
Convenient and Useful in Many Work Places
These ear plugs also work great for protection from many high impulse noises such as pneumatic power tools used in automotive and machining or even nail guns used in construction. However their reactive filters are not designed for work places with constant loud noise levels. They also come with a handy carry case with keyring or the slim design is perfect to just slip in your pocket.