Noise Level Comparison Chart
How loud is that? An interactive decibel (dB) guide to common sounds, hearing damage thresholds, and protection recommendations.
Sound is measured in decibels (dB) on a logarithmic scale — every 10 dB increase means the sound is 10× more intense and perceived as roughly twice as loud. This chart compares everyday sounds, shows when hearing damage begins, and explains how to protect yourself.
Noise Zones
No hearing damage risk at any exposure duration
Prolonged exposure (8+ hours) may cause gradual hearing loss
Hearing damage occurs — exposure time limits apply
Immediate damage — even brief exposure causes permanent harm
How Loud Is That?
OSHA Permissible Exposure Limits
The Occupational Safety and Health Administration (OSHA) sets maximum daily noise exposure times for workers. For every 5 dB increase above 85 dB, the permissible exposure time is cut in half.
| Noise Level | Max Exposure | Context |
|---|---|---|
| 85 dB | 8 hours | OSHA permissible exposure limit (PEL) |
| 88 dB | 4 hours | Every 5 dB increase halves safe time (OSHA exchange rate) |
| 91 dB | 2 hours | Common in manufacturing environments |
| 94 dB | 1 hour | Equivalent to a loud factory floor |
| 97 dB | 30 min | Nightclub DJ booth levels |
| 100 dB | 15 min | Standing next to a subwoofer at a concert |
| 103 dB | 7.5 min | Chainsaw at operator position |
| 106 dB | 3.75 min | Approaching pain threshold |
| 110 dB | 1.5 min | Risk of immediate permanent damage |
| 115 dB | < 1 min | OSHA maximum — no unprotected exposure allowed above this |
Hearing Damage Thresholds
Prolonged exposure (8+ hours) starts causing irreversible cochlear hair cell death
Unprotected exposure for more than 15 minutes risks permanent hearing loss
Physical pain in the ear; immediate damage even with brief exposure
Eardrum perforation possible; single exposure causes permanent loss
Noise-Cancelling & Hearing Protection Effectiveness
Not all hearing protection is equal. The Noise Reduction Rating (NRR) indicates how many decibels a device can block — but real-world performance is typically 50–70% of the rated NRR due to fit and usage.
| Protection Type | NRR | Best For | Notes |
|---|---|---|---|
| Foam earplugs | 22–33 dB | Sleeping, concerts, power tools | Cheap and effective; real-world reduction ~50% of NRR |
| Over-ear passive muffs | 20–30 dB | Construction, mowing, shooting range | Comfortable for long wear; combine with earplugs for max protection |
| ANC headphones (consumer) | 15–25 dB | Commuting, office, flights | Best at low-frequency drone (planes, AC); less effective on sharp/sudden sounds |
| ANC earbuds (consumer) | 10–20 dB | Gym, walking, light commute | Seal quality varies by ear tip; less isolation than over-ear |
| Custom-molded earplugs | 25–35 dB | Musicians, motorsports, industrial | Flat attenuation preserves sound quality; expensive but durable |
| Double protection (plugs + muffs) | 30–40 dB | Firearms, heavy machinery, aviation | Required for exposures above 105 dB in many workplaces |
Common Scenarios & Recommendations
Concerts & Festivals
Typical level: 100–120 dB
Use musician's earplugs (custom-molded or high-fidelity). They reduce volume 15–25 dB while preserving sound quality. Standard foam plugs muffle sound unevenly.
Power Tools & DIY
Typical level: 85–110 dB
Over-ear muffs are ideal — easy to put on/off between tasks. For extended work with circular saws or routers, combine foam plugs with muffs.
Open-Plan Office
Typical level: 50–70 dB
ANC headphones excel here. They neutralize the low-frequency HVAC and chatter hum. Not dangerous, but fatiguing — ANC reduces cognitive load.
Sleeping (Noisy Environment)
Typical level: 40–60 dB
Soft silicone or wax earplugs with NRR 22+ work best. White noise machines can also mask intrusive sounds without blocking them.
Frequently Asked Questions
How does the decibel scale work?
The decibel scale is logarithmic, not linear. Every increase of 10 dB represents a sound that is 10 times more intense and perceived as roughly twice as loud. So 80 dB isn't slightly louder than 70 dB — it's 10 times more powerful and sounds about twice as loud to your ears.
At what noise level does hearing damage begin?
Hearing damage can begin at 85 dB with prolonged exposure (8+ hours). Above 120 dB, damage can occur almost instantly. OSHA sets 85 dB as the permissible exposure limit for an 8-hour workday. The key factors are both volume AND duration — a 90 dB lawn mower for 2 hours is as damaging as 85 dB for 8 hours.
Do noise-cancelling headphones protect hearing?
Consumer ANC headphones reduce ambient noise by 15–25 dB, which helps in moderate environments like offices and planes. However, they are NOT rated as hearing protection devices (HPDs) and should not replace proper earplugs or earmuffs in loud environments like construction sites or concerts above 100 dB.
What's the difference between OSHA and NIOSH noise standards?
OSHA uses a 5 dB exchange rate (halving safe exposure time every 5 dB) and sets the action level at 85 dB. NIOSH uses a stricter 3 dB exchange rate and recommends a limit of 85 dB for 8 hours. In practice, NIOSH guidelines offer more conservative protection and are preferred by audiologists.
How loud is too loud for headphone listening?
Most smartphones max out at about 100–115 dB through headphones. The WHO recommends limiting personal audio to 85 dB for no more than 1 hour per day. A good rule of thumb: if you can't hear someone talking at arm's length while wearing headphones, the volume is too high.