Decibel Shield
Safe Decibel Levels
A safe decibel level is 70 dB or below, which causes no hearing damage at any duration (EPA). Risk begins at 85 dB averaged over 8 hours (NIOSH), and every 3 dB louder halves the safe time. Sounds at 120 dB and above can damage hearing instantly.
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| Decibel range | Verdict | What it means | Sounds like | Source |
|---|---|---|---|---|
| Below 70 dB | Safe | No hearing damage at any length of time. | Whisper, conversation, dishwasher | EPA |
| 70–85 dB | Generally safe | Fine for a normal day; risk only if sustained near 85 dB. | City traffic, vacuum, hair dryer | NIOSH |
| 85–100 dB | Risk with time | Damage builds with exposure; the safe window shrinks fast. | Lawn mower, motorcycle, subway | NIOSH |
| 100–120 dB | High risk | Safe for minutes or less — wear hearing protection. | Concert, chainsaw, nightclub | NIOSH |
| 120 dB and above | Immediate risk | Can injure hearing instantly, with no safe duration. | Siren up close, fireworks, jet engine | WHO |
Every threshold above is a published figure — the EPA's 70 dB all-day floor, NIOSH's 85 dB(A) 8-hour limit, and the WHO's 120 dB immediate-risk level — not invented by us. See the full decibel chart of common sounds for sourced levels of 30+ situations.
What is a safe decibel level?
The clearest safe line is the EPA's 70 dB level: averaged over a full day, sound at or below 70 dB is not expected to cause hearing loss over a lifetime, for any length of exposure. That covers most of daily life — conversation is about 60 dB, a dishwasher about 70 dB. Above that, safety depends on how long you listen.
How long is each level safe? (NIOSH listening times)
Once sound passes about 85 dB, safety is a budget of time. NIOSH sets its recommended exposure limit at 85 dB(A) for 8 hours, and because the decibel scale is logarithmic the safe time halves with every 3 dB increase:
| Decibel level | Safe time per day (NIOSH) |
|---|---|
| 85 dB | 8 hours |
| 88 dB | 4 hours |
| 91 dB | 2 hours |
| 94 dB | 1 hour |
| 97 dB | 30 minutes |
| 100 dB | 15 minutes |
| 103 dB | 8 minutes |
| 106 dB | 4 minutes |
| 109 dB | 2 minutes |
| 112 dB | 56 seconds |
What decibel level is dangerous?
Any sustained sound at or above 85 dB carries hearing risk, and the danger rises sharply with loudness: about 15 minutes is safe at 100 dB, under 2 minutes at 110 dB. At 120 dB and above — a siren up close, fireworks, a jet at takeoff — sound can injure hearing immediately, with no safe duration. For the exact thresholds and the science, see what decibel level is dangerous for hearing.
Safe noise levels at work (OSHA vs NIOSH)
Two US numbers differ. OSHA's legal workplace limit is 90 dB over 8 hours with a 5 dB exchange rate. NIOSH's health-protective recommendation is stricter — 85 dB with a 3 dB exchange rate — and it is the figure hearing researchers use, and the one this page is built on. If you have to raise your voice to be heard an arm's length away, you are likely above 85 dB.
Are safe decibel levels different for children?
Children's ears are more vulnerable to noise, but the protective thresholds are the same: under 70 dB is safe for any duration, and risk begins with sustained exposure at 85 dB. Because their exposure adds up over a lifetime, it is worth keeping loud toys, headphones and events for children well within these limits.
Check the level around you
These limits are about protecting hearing. Chronic environmental noise also affects health — sleep, stress, blood pressure — at much lower levels; see noise pollution for that side. Use the free online decibel meter to estimate how loud your surroundings are right now — it runs in your browser and records nothing. To check your own hearing, try the hearing age test or the online hearing test, and see how cities compare on the city sound map.
Common questions
What is a safe decibel level?
A safe decibel level is 70 dB or lower, which the EPA says causes no hearing damage at any duration. From 70 to 85 dB is fine for a normal day. Sustained exposure at or above 85 dB (NIOSH) is where hearing risk begins, and the safe time shrinks fast above it.
What decibel level is dangerous?
Hearing risk begins at 85 dB averaged over 8 hours, and every 3 dB louder halves the safe time, so 100 dB is safe for only about 15 minutes. At 120 dB and above, sounds like sirens and fireworks can damage hearing immediately.
Is 85 dB safe?
85 dB is the threshold, not a comfort zone: NIOSH treats it as safe for at most 8 hours a day. Any longer, or any louder, and hearing risk rises. Below 70 dB there is no time limit at all.
Are safe decibel levels different for children?
Children's hearing is more vulnerable to noise, but the protective thresholds are the same: under 70 dB is safe for any duration, and risk begins with sustained exposure at 85 dB. Keep loud toys, headphones and events for children well within these limits.