The Noise We Ignore.

More than a hearing issue

We usually think about noise when it gets loud enough to hurt our ears: a concert, a power tool or a passing siren. But the noise that fills everyday life can matter, too. Traffic outside a bedroom window, aircraft overhead and the constant hum of a busy road may not damage hearing in the same way as a loud concert. Long-term exposure can nevertheless interfere with sleep and contribute to stress-related health effects. [3]

Noise is not the second leading cause of death in America. You may have seen that claim online. The World Health Organization described noise as second only to air pollution in its 2011 assessment of European environmental disease burden. That was not a U.S. ranking of causes of death. [9]

What new U.S. research found

A 2026 national assessment in Environmental Research combined modeled transportation-noise exposure across the contiguous United States with published exposure–response relationships. The researchers estimated the following annual burden among roughly 324 million residents: [1]

These are model-based estimates using assumptions about exposure and disease risk. They cannot establish the cause of a particular person's illness or death. The study evaluated transportation noise, not every source of sound.

U.S. evidence predates this national estimate. A study published in 2024 analyzed cardiovascular and external-cause mortality records from five states and reported an association between long-term human-generated noise and cardiovascular mortality. As an observational study, it cannot prove that noise caused individual deaths. [2]

What happens beyond the ear?

Hearing damage is only one possible outcome of noise exposure. Research has also examined how persistent or recurring unwanted sound may activate stress pathways, interrupt sleep and influence cardiovascular health. Several effects can happen without a person recognizing the noise as dangerously loud. [3]

Evidence is stronger for some outcomes, such as road traffic noise and ischemic heart disease, than for others. Exposure, individual susceptibility and other factors, including air pollution, can complicate the picture. [3]

Two kinds of exposure. Different precautions.

Small changes that lower your exposure

You may not be able to control every sound around you, but you can often reduce the loudest or longest exposures. Start with the changes available in your home, work and recreation. [5]

1. Turn down the source when you can.

   Choose quieter appliances and tools where practical; reduce speaker and headphone volume. Lowering sound at its source is more reliable than trying to block it afterward.

2. Make sleep a quieter part of your day.

   When feasible, use a bedroom away from a busy street, close windows during peak traffic periods and address gaps that let outside noise in. If neighborhood or building noise is persistent, ask about building-level solutions.

3. Use real hearing protection for loud activities.

   Wear properly fitted earplugs or earmuffs for loud tools, concerts and similar exposures. Very high noise levels and impulse sounds may warrant both. Ordinary noise-canceling headphones are not a substitute for rated hearing protection. [6]

4. Increase distance and shorten exposure.

   Move away from speakers or equipment, take breaks from loud environments and choose a quieter seating area when possible. Loudness and duration both influence hearing risk. [5]

5. Pay attention to everyday listening habits.

   If you keep increasing headphone volume to overcome traffic or gym noise, try a quieter place or a better-fitting headset instead. Noise cancellation may allow comfortable playback at a lower volume but does not automatically provide certified hearing protection.

6. Check sound levels when unsure.

   A sound-level meter or the NIOSH sound-level meter app can help you recognize potentially hazardous loud settings. A phone reading is a screening aid, not a diagnosis or proof of a safe exposure. [4]

7. Speak up about noise you cannot control.

   Ask an employer about noise controls, request a quieter study or work area, or raise recurring transportation noise with property managers or local officials. Reducing noise at the source can help more people than individual protection alone.

Don't forget your hearing tests.

Even when the bigger story is cardiovascular health and sleep, protecting your hearing remains essential. Noise-related hearing changes can develop slowly. Difficulty following conversations, ringing in the ears or regularly increasing the TV volume are reasons to arrange a professional evaluation. [7]

Get a baseline hearing evaluation if you have substantial noise exposure, then ask an audiologist how often to repeat it. Regular follow-up helps identify changes over time. For workers exposed to hazardous occupational noise, NIOSH recommends annual audiometric testing in a hearing conservation program. A single yearly schedule is not necessary for every adult; the appropriate interval depends on exposure, symptoms and clinical advice. [4]

Keep learning

• How Loud Is Too Loud?Decibel levels and how exposure time changes hearing risk.
• How to protect your hearingBuild a realistic prevention routine around work and recreation.
• Noise-induced hearing lossRecognize early changes and know when to seek medical care.
• Earplugs vs. earmuffsChoose a protector that fits and works for your exposure.