This infographic comes to us from SmokingBarrelUSA.com. At face value, it has valuable information regarding the noise levels you are dealing with while shooting and ways you can reduce the damage that sound causes to your ears. However, with the Hearing Protection Act looming, this is even more relevant.
Firearms are loud. They are loud enough to cause irreversible damage to your ears. So, double up on earpro and contact your representatives to tell them you support the Hearing Protection Act.

Source: The Smoking Barrel USA
That’s no 9mm