Firing a gun without ear protection exposes your ears to a blast of sound that exceeds the threshold for immediate, permanent hearing damage. Every common firearm, from a .22 rifle to a 12-gauge shotgun, produces peak noise levels well above 140 decibels, the point that international safety standards and OSHA identify as the ceiling for any single impulse of sound. A single unprotected shot can cause lasting harm.
How Loud Guns Actually Are
The decibel scale is logarithmic, meaning every 10 dB increase represents a tenfold jump in sound intensity. Normal conversation sits around 60 dB. A rock concert hits roughly 110 dB. Gunshots occupy a completely different tier. A .22 caliber rifle, often thought of as quiet, still peaks between 139 and 144 dB depending on the model. Fire that same .22 from a pistol and the shorter barrel pushes it to 154 to 158 dB.
Larger calibers are worse. A 9mm handgun like the Glock 17 peaks at 163 dB. A .45 ACP from a 1911 hits around 159 dB. Shotguns loaded with hunting or turkey loads range from 156 to 161 dB. A .308 rifle reaches 159 dB. Every single one of these exceeds the 140 dB safety limit, most by a wide margin. At these levels, the damage isn’t cumulative over time. It can happen in a fraction of a second.
What Happens Inside Your Ear
The inner ear contains thousands of tiny hair cells that convert sound vibrations into electrical signals your brain interprets as sound. These cells are arranged along a structure called the cochlea, with different regions responding to different frequencies. High-frequency hair cells, the ones responsible for hearing consonant sounds in speech and high-pitched tones, are the most vulnerable to noise damage.
When a gunshot’s pressure wave hits, it physically batters these hair cells. The delicate sensory structures on top of each cell, called stereocilia, can bend, break, or fuse together. Once destroyed, human hair cells do not regenerate. The damage is mechanical and irreversible. At the cellular level, the trauma also triggers a cascade of chemical changes, including surges in calcium concentration that spread through surrounding support cells, essentially the inner ear’s distress signal that damage has occurred.
What makes this worse: the pressure wave from a gunshot doesn’t only enter through your ear canal. It also travels through your skull and soft tissue via bone conduction, reaching the inner ear structures directly. This is why even earplugs, which block sound in the ear canal, can’t fully protect against the most intense blasts. The vibrations find another path in.
Immediate Effects After a Shot
The first thing most people notice is a sudden muffling of sound, as if someone stuffed cotton in their ears. This is called a temporary threshold shift, and it reflects the inner ear’s acute response to being overwhelmed. Sounds seem quieter, and you may struggle to hear people talking, especially in the higher-pitched range above 6,000 Hz. Studies on police officers after firearms training have confirmed that even with headphone-style hearing protection, significant temporary threshold shifts occur at these high frequencies. Without protection, the shift is far more pronounced.
Tinnitus, a ringing, buzzing, or hissing sound with no external source, almost always accompanies the threshold shift. For some people, it fades within hours. For others, it becomes permanent. There’s no reliable way to predict which outcome you’ll get from a single exposure. You may also feel a sensation of fullness or pressure in the affected ear, similar to what you’d feel during a rapid altitude change but more persistent.
When Temporary Damage Becomes Permanent
A temporary threshold shift can resolve within hours to a few days, but this recovery is misleading. Even when your hearing seems to return to normal, research suggests that subclinical damage to the nerve connections between hair cells and the brain may persist. This “hidden hearing loss” doesn’t show up on a standard hearing test but can make it harder to understand speech in noisy environments.
With repeated unprotected exposures, the damage accumulates. Each shot destroys more hair cells, and the threshold shift becomes less temporary. The classic pattern in shooters is a permanent hearing loss centered around 4,000 to 6,000 Hz, sometimes called a “noise notch” on an audiogram. This frequency range is critical for understanding speech. Words start to sound mumbled. You find yourself asking people to repeat themselves. Background noise becomes overwhelming. This type of hearing loss is not correctable with surgery and only partially helped by hearing aids.
A single exceptionally loud blast, such as from a muzzle-braked rifle or a magnesium-loaded shotgun round in an enclosed space, can cause permanent damage in one shot. Muzzle brakes redirect propellant gases sideways, which reduces felt recoil but increases the noise level at the shooter’s ear by roughly 3 dB compared to a bare muzzle. In a concrete-walled indoor range, reflected sound waves compound the exposure further.
What You Can Do After Unprotected Exposure
If you’ve already fired without protection and are experiencing muffled hearing or ringing, the most important variable is time. Acute acoustic trauma is one of the few types of hearing loss where early medical intervention may help. A meta-analysis published in Military Medicine found that steroid therapy, when administered after acute noise exposure, improved hearing thresholds by roughly 7 to 9 dB across tested frequencies. When steroids were combined with hyperbaric oxygen therapy, the improvement reached about 12 dB at higher frequencies. These aren’t miracle cures, but they represent meaningful recovery, especially in the speech-critical range.
The window for treatment is narrow. Most protocols used in the studies involved treatment within days of the exposure, not weeks. If your hearing doesn’t return to normal within 24 hours, or if tinnitus persists, getting an audiological evaluation quickly gives you the best chance at partial recovery.
How Protection Changes the Math
Standard foam earplugs reduce noise by about 20 to 30 dB when inserted correctly. Over-ear muffs provide similar reduction. Combining both, plugs inside muffs, can cut exposure by 30 to 40 dB, which brings most firearms into a range where the risk of immediate damage drops significantly. Electronic earmuffs add the benefit of amplifying normal conversation while clamping down on impulse noise.
Suppressors reduce gunshot noise by 20 to 35 dB depending on the caliber and suppressor design, typically bringing the report down to 120 to 140 dB. That often lands right at or just below the 140 dB safety threshold. Even the best suppressors on the market rarely get below 110 dB, so they don’t make shooting “quiet” by any stretch. They do, however, reduce the risk enough that a single unprotected shot is far less likely to cause permanent damage, which is why they’re increasingly recognized as hearing-conservation tools rather than purely tactical accessories.
For maximum protection, pairing a suppressor with foam earplugs or muffs brings exposure down to levels comparable to a loud lawnmower, well within what the ear can handle safely. No single layer of protection is foolproof on its own, particularly because bone conduction bypasses anything you put in or over your ears. But each layer matters, and the difference between zero protection and even basic foam plugs is the difference between likely permanent damage and a manageable exposure.