The burning propellant gases produced by firearms are under high pressure and produce ear-damaging noise. This noise can and will damage a person's hearing permanently. Hearing damage is incremental and builds up over time. When your ears stop ringing they are not "back to normal". The ringing in your ears is a sign of hearing damage and over time can lead to Tinnitus or deafness. Tinnitus is a constant hum or ringing of the ears.

Noise-reducing ear-muffs are always preferable as they provide the greatest amount of protection. Ear plugs must be securely placed into the ear canal and form a sound-proof seal in order to be effective. While conducting practice or training on an indoor range or under cover combining ear plugs and muffs is preferable.

The burning gas, ejecting brass casings, unburnt powder and fragments of projectiles all present a hazard to the eyes. Every person participating is firearms training or practice must wear some form of shatter-proof eye protection. Any person nearby or spectating must wear ear and eye protection as well.

Ear and eye protection are relatively inexpensive. When compared to the cost of electronic hearing aids for damaged ears or surgery to repair damaged eyes the cost is inconsequential. There is no excuse not to protect your vision and hearing.