The Short Answer

Noise-cancelling headphones may be useful for minimizing the amount of noise around you, but they cannot be considered certified hearing protection. In regular situations (airplanes, offices, buses, trains, or loud street environments), active noise cancellation (ANC) is useful, since, due to the noise around, many people raise the volume of music they listen to, which ANC headphones might help minimize.

Nevertheless, noise-cancelling headphones are neither designed nor certified as hearing protection equipment in loud environments, unlike earplugs or earmuffs, which have NRR rating – Noise Reduction Rating, the standard for hearing protection devices used in the USA.

The importance of the difference between noise-cancelling headphones and hearing protection comes into play when there is a lot of loud equipment (lawn mowers, construction equipment, firearms, or power tools). In such cases, specialists advise using hearing protection rather than ANC headphones. As an audiologist, Cory Portnuff, AuD, PhD, puts it: "Noise-cancelling headphones are not good enough to be protective from damaging your hearing around loud sounds like a lawnmower or light construction work."

"Quieter" and "safe" are not the same thing

Real hearing protection comes with a number on the package: NRR, which stands for Noise Reduction Rating. It's measured in decibels, and higher means more protection — the EPA puts the range for existing protectors at roughly 0 to 30. Consumer headphones don't have one. There's no NRR on the box, on the product page, or buried in the spec sheet, because headphones aren't tested or labeled as hearing protectors.

So the test is a simple one: can you find an NRR for it? If you can't — and you can't, for any pair of headphones — you're buying a listening device, not protection. One more thing about that number.It only matters if the fitting is done correctly. The EPA label itself states that the effectiveness of the product is dependent upon correct fitting, which is why foam earplugs have to be rolled up thin, fitted deeply, and held while they expand.

What they’re really good at

Noise cancellation works best on steady, low frequency noises: airplane engines, train noise, the sound of an air conditioner. It's weaker on sound that keeps changing — people talking, traffic, the general noise of a busy street. More expensive models handle that better than cheap ones.

But the bigger benefit isn't what it blocks. It's what it lets you avoid doing.

"They can help you be able to lower the volume on your music, podcasts, or whatever you're listening to so you don't have to turn it up so high," says Cory Portnuff, AuD, PhD, an audiologist at the University of Colorado School of Medicine. That's the part worth understanding. On a plane, the danger usually isn't the engine — it's how far you had to push the volume to hear your podcast over the engine. His rule of thumb: "Ultimately, what we're most concerned about is the sound level at your ear in your headphones." Not whether the cancellation is switched on. How loud, and how long.

Where they stop being enough

Lawn mowers, leaf blowers, power tools, light construction

These are loud enough that consumer electronics don't close the gap. Dr. Portnuff is direct about it: "Noise-cancelling headphones are not good enough to be protective from damaging your hearing around loud sounds like a lawnmower or light construction work."

Sudden, sharp noise

Gunfire, fireworks, a nail gun. Even a real hearing protector's NRR doesn't predict performance here — the EPA notes the rating is based on continuous noise and may not reflect protection against impulsive sound. Headphones have nothing to offer at all.

What the headphones play into your ears

This one is a different issue entirely. Cancelling outside noise does nothing to cap the volume coming from the device itself. The University of Michigan's environmental health and safety office puts the maximum output of these devices as high as 110 dBA. For reference, the NIDCD says sound at or above 85 dBA can damage hearing over time.

What to wear, and when

A way to judge a situation in the moment, without owning a sound meter. The CDC has a shortcut that works anywhere. Try to talk to someone standing three feet away. What happens next tells you which tier you're in.

Tier 1 — You can talk normally

Roughly 70 dBA or below, which the NIDCD considers generally safe even over long periods. Ordinary conversation sits at 60 to 70 dBA. A restaurant where you can hear each other, an office, driving in traffic.

What to wear: nothing. This is the level you want your life to mostly live at.

Tier 2 — You have to raise your voice

Around 85 dBA. This is where damage starts to accumulate, and it's also where the CDC's recommended daily limit sits: 85 dBA across an eight-hour day. The agency's own examples of this tier are mowing the lawn, running the vacuum, and using power tools. Movie theaters (74 to 104 dBA) and motorcycle riding (80 to 110 dBA) land here too.

What to wear: earplugs or earmuffs with an NRR. Basic foam plugs from the hardware store are fine — the rating matters less here than whether you actually seat them. Time matters as much as volume: an hour is not the same as a full day.

Tier 3 — You have to shout

95 dBA and up. The CDC's examples: chainsaws, bulldozers, ambulance sirens, bars and nightclubs, large sporting events. The NIDCD's own table puts concerts and headphones at maximum volume at 94 to 110 dBA, and an ambulance siren at 110 to 129.

What to wear: rated protection, distance from the source, and breaks. At this level the length of exposure is the thing that decides the outcome, so "I'll only be a minute" is doing real work for you.

If your ears are already ringing

Have you ever gone to a concert, sports activity, nightclub, or work environment where you found yourself experiencing the sensation of ringing in your ears or a muffled "underwater" feeling? This could be an indication from your ears. Many people think this is a normal process due to loud sounds. Actually, this means your auditory system was under the pressure of loud sounds.

Sometimes the sensation goes away within one or two days. According to NIDCD (National Institute on Deafness and Other Communication Disorders), temporary change in hearing improves after 16–48 hours. But this does not always mean no harm has been done. Some studies show that hearing impairment may occur due to repeated noise exposure.

Be aware of what takes place after the ringing sound subsides. Is speech clarity getting worse? Is it becoming difficult to hear at restaurants? Does the volume have to be turned up frequently at home? Have you started using subtitles more than usual? These subtle signs may be easier to spot than hearing loss.

Should you start hearing ringing sounds more often, for a few days or along with hearing difficulties, then it would be wise to make an appointment for a hearing test instead of just hoping that the issue clears up on its own.

Common questions

Do noise-cancelling headphones protect hearing at a concert?

Not reliably. Concert sound is loud and constantly changing, which is the exact combination active cancellation handles worst. Wear earplugs — high-fidelity ones keep the music sounding like music.

Is it the headphones or is it the volume that harms?

The volume, and the length of time one listens. Earbuds and over-ear headphones pose an equal risk when the volume is equally measured. Over-ear and noise-canceling headphones offer a practical advantage; there’s less background noise, so there’s less need for a higher volume.

Does the noise cancellation itself hurt your ears?

There's no good evidence that the cancellation signal damages hearing. Some people find the pressure feeling uncomfortable, which is a comfort issue rather than a safety one. What sets your risk is the level at your ear and how long you're exposed.

Sources

• University of Colorado Anschutz Medical Campus — Do Noise-Cancelling Headphones Help or Hurt Hearing? (2025)
• U.S. Environmental Protection Agency (EPA) — Hearing Protective Devices
• CDC / NIOSH — Noise Exposure Recommendations
• NIDCD — Noise-Induced Hearing Loss
• NIDCD — Hearing Protectors
• University of Michigan Environment, Health & Safety — Noise-Cancelling Headphones/Earbuds versus Hearing Protection Devices (2025)