Decibel levels of
everyday sounds.
Most everyday sounds fall on a predictable scale: a whisper is around 30 dBA, normal conversation around 60 dBA, city traffic and a busy restaurant 70-85 dBA, a vacuum or blender 75-90 dBA, a gas lawn mower 90-100 dBA, and a rock concert or a jet at takeoff 110-130 dBA. The line that actually matters for your ears is 85 dBA: below it, sustained sound is generally safe, and at or above it the safe listening time roughly halves for every extra 3 decibels.
That second sentence is the whole point of this page. Almost every decibel chart online copies the same numbers from the last one and stops there, leaving you with a list of figures that mean nothing on their own. A number like "90 dBA" is not dangerous or safe by itself. What makes it risky is how long you stay in it. So this chart is anchored to the one threshold health agencies agree on, and every loud row carries a second column: how many hours at that level before you have used up a full day's safe dose.
The one number to anchor everything: 85 dBA
The U.S. National Institute for Occupational Safety and Health (NIOSH) sets a recommended exposure limit of 85 A-weighted decibels (dBA) averaged over an 8-hour workday. Below that, routine exposure is considered safe for hearing. At or above it, the risk of permanent, noise-induced hearing loss starts to accumulate, and it builds with every hour you stay in the noise. NIOSH is blunt about the upside: hearing loss from routine noise exposure is essentially 100% preventable, because it depends on dose, and dose is something you can control by lowering the volume, stepping back, or shortening the time.
The second rule is the exchange rate. For every 3 dB increase in level, NIOSH recommends cutting your exposure time in half. Decibels are logarithmic, so 3 dB more is roughly double the sound energy hitting your ear, and the safe time halves to match. That single rule turns a flat chart into a usable one:
Uses the NIOSH 85 dBA limit and 3 dB exchange rate. The app measures real levels live, no slider needed.
| Level | Safe time per day |
|---|---|
| 82 dBA | ~16 hours |
| 85 dBA | 8 hours (the limit) |
| 88 dBA | 4 hours |
| 91 dBA | 2 hours |
| 94 dBA | 1 hour |
| 97 dBA | 30 minutes |
| 100 dBA | 15 minutes |
Note that the workplace standard from OSHA uses a more permissive 5 dB exchange rate and a 90 dBA legal limit, which is why an employer's "compliant" number can still be one a hearing scientist would call risky. This guide follows the more protective NIOSH figures, because the goal here is your ears, not the legal minimum.
The chart: familiar sounds, mapped to dBA
Here is the part everyone comes for, with the safe-time column attached so the numbers carry meaning. Read the levels as typical ranges measured at a normal listening distance, not fixed facts.
| Sound | Typical dBA | Risk |
|---|---|---|
| Rustling leaves, quiet library | 20-30 | Safe all day |
| Whisper, ticking clock | 30 | Safe all day |
| Quiet home, refrigerator hum | 40-50 | Safe all day |
| Normal conversation, office | 55-65 | Safe all day |
| Busy restaurant, dishwasher | 70-80 | Safe all day |
| City traffic from the sidewalk | 80-85 | ~8 hours at 85 |
| Vacuum cleaner, hair dryer | 75-85 | Up to ~8 hours |
| Blender, garbage disposal | 85-90 | ~4-8 hours |
| Motorcycle, food processor | 90-95 | ~1-2 hours |
| Gas lawn mower, leaf blower | 90-100 | ~15 min-2 hours |
| Power tools, table saw, subway | 95-105 | Minutes |
| Rock concert, nightclub front row | 100-115 | Minutes or less |
| Chainsaw, ambulance siren up close | 110-120 | Seconds |
| Jet at takeoff (close), firecracker | 120-140 | Immediate risk |
A few things stand out once the safe-time column is there. The big jump is not from quiet to loud, it is across 85 dBA, which is exactly where the workhorse appliances in your kitchen and garage live. A blender, a hair dryer, a lawn mower: these are not exotic. They are the sounds that quietly chip away at hearing because people stand in them, unprotected, for far longer than the chart's safe time allows. The World Health Organization estimates that more than a billion young people are at risk of hearing loss from unsafe listening, much of it not from disasters but from ordinary, repeated exposure that nobody thought to measure.
Why your real number is never the chart's number
Every row above ends with the same honest caveat, so let us say it plainly: these are typical ranges, and your actual exposure depends on two things a chart can never know.
-
Distance
Sound level drops steeply as you move away from the source. A gas lawn mower reads close to 100 dBA at the handle, where your head is, but nearer 75 dBA across the yard. The chart's "90-100" is true at the machine and meaningless at the fence. The only way to know which one applies to you is to measure from where you are standing.
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The room
A hard, bare room with tile and glass reflects sound and pushes the level up. A carpeted room with curtains and a sofa soaks it up. The same TV, the same blender, the same conversation reads several decibels higher in a kitchen than in a living room. A generic chart assumes an average room that may be nothing like yours.
This is the gap between a chart and reality, and it is the gap a measurement closes. A chart tells you that a restaurant is "typically 70-80 dBA." Your phone tells you that this restaurant, at your table, is 84 dBA and you have been raising your voice all night for a reason. NIOSH offers a field rule of thumb that lines up perfectly: if you have to raise your voice to be heard by someone an arm's length away, the noise is probably in the hazardous range. A reading just puts a number on what your strained voice already told you.
Turn the chart into your number
This is where a sound meter earns its place. Honest Decibel turns the iPhone microphone into a real-time dBA reading using the same A-weighted scale the chart and the agencies use, so what you see on screen is directly comparable to the figures above. Point your phone at the sound in front of you and you replace a typical range with the one value that describes your situation.
A phone is not a calibrated Type 1 or Type 2 sound level meter. Its microphone is tuned for voice and can compress very loud peaks, so a reading is a good estimate, not a courtroom measurement, and you should not use it for compliance or legal work. But for the question this page is really about, "am I in the safe column or not," an estimate taken at your real distance, in your real room, beats a generic chart every time.
Open Honest Decibel, tap Start, and read the dBA for whatever is around you right now. The peak-hold marker catches the loudest moment so a sudden siren or a dropped pan does not slip past you, and haptic ticks fire as you cross each band, so you feel yourself move from the safe column into the risky one without having to stare at the screen. The microphone stays off until you tap Start and stops the moment you leave the app; nothing is recorded and nothing leaves your phone.
Get it on the App Store ↗Questions people ask
What are the decibel levels of common sounds?
Typical A-weighted levels run roughly: a whisper 30 dBA, a quiet home 40 dBA, normal conversation 60 dBA, a busy restaurant 70-80 dBA, city traffic from the sidewalk 80-85 dBA, a vacuum or blender 75-90 dBA, a gas lawn mower 90-100 dBA, and a rock concert or jet at takeoff 110-130 dBA. These are typical ranges; your real exposure depends on distance and the room, so the only number that describes your situation is one you measure where you are standing.
At what decibel level does sound become dangerous?
NIOSH recommends keeping exposure at or below 85 dBA averaged over an 8-hour day. Below 85 dBA, sustained exposure is generally safe for hearing. At and above 85 dBA the risk accumulates with time, and the safe time roughly halves for every 3 dB increase: 85 dBA is safe for about 8 hours, 88 dBA for about 4 hours, 91 dBA for about 2 hours. Very loud events above about 120 dBA can damage hearing almost immediately.
How long can I listen to 90 decibels safely?
Using the NIOSH 3 dB exchange rate, the recommended limit at 91 dBA is about 2 hours per day, and at 88 dBA about 4 hours. So at roughly 90 dBA you are looking at somewhere between 2 and 4 hours before you reach a full daily noise dose. Above that, the recommendation is to lower the volume, increase your distance from the source, or wear hearing protection.
Is a phone decibel reading accurate?
A phone is not a calibrated Type 1 or Type 2 sound level meter. Its microphone is tuned for voice and can compress very loud sounds, so treat the reading as a good estimate rather than a legally precise measurement. For everyday awareness, though, a phone reading taken where you actually are is far more useful than a generic chart, because it captures your real distance and room.
Why does the same sound show a different decibel level in different places?
Sound level falls with distance and changes with the room. The same lawn mower reads near 100 dBA at the handle and closer to 75 dBA across the yard, and a hard, bare room reflects sound so it reads higher than a carpeted, soft one. That is exactly why a chart can only give a typical range, and why measuring at your own position gives the number that matters for your ears.
Keep reading
Sources: CDC / NIOSH, Understand Noise Exposure; CDC / NIOSH, Noise and Hearing Loss (85 dBA REL and 3 dB exchange rate); OSHA, Occupational Noise Exposure; WHO, Deafness and Hearing Loss. This guide is informational and is not medical advice; a phone microphone is an estimate, not a calibrated Type 1 or Type 2 sound level meter.
Honest Decibel is one of the small, private iOS tools in the Keltek apps studio.