Daily Dose
800%
Risk
Dangerous
Safe Min
15
Weekly
4000%
800%
15
4000%
Dangerous
Daily Noise Dose
800%
DangerousEarmuffs or high-NRR plugs (NRR 25+)
Common Noise Levels (dB)
Inputs
Result
At 105 dB, the safe exposure limit is under 5 minutes. Two hours produces a noise dose 24 times the daily limit, posing extreme risk for permanent hearing damage.
Inputs
Result
At 80 dB, exposure is well within safe limits. This is typical of moderate headphone volume in a quiet office. No hearing protection needed at this level.
Inputs
Result
Unprotected 95 dB exposure for 6 hours is 6 times the safe limit. With NRR 25 earplugs (effective reduction ~12.5 dB), the level drops to 82.5 dB, well within safe limits.
Sounds above 85 decibels (dB) can cause hearing damage with prolonged exposure. At 85 dB, NIOSH recommends a maximum of 8 hours. Every 3 dB increase halves the safe time: 88 dB allows 4 hours, 91 dB allows 2 hours, and 100 dB only 15 minutes. A rock concert at 110 dB can damage hearing in under 2 minutes.
| Decibel Level | Example Source | Safe Exposure Time |
|---|---|---|
| 70 dB | Vacuum cleaner | Unlimited |
| 85 dB | Heavy traffic | 8 hours |
| 94 dB | Power tools | 1 hour |
| 100 dB | Nightclub | 15 minutes |
| 110 dB | Rock concert | < 2 minutes |
The NIOSH noise dose measures cumulative noise exposure as a percentage of the maximum allowable daily limit. A dose of 100% means you have reached the full safe limit. It is calculated by dividing actual exposure time by the allowable time at each decibel level, using the 3 dB exchange rate.
| Standard | Reference Level | Exchange Rate | Time at 85 dB |
|---|---|---|---|
| NIOSH | 85 dB | 3 dB | 8 hours |
| OSHA | 90 dB | 5 dB | 16 hours |
Yes. Most headphones can output 85–110 dB. Listening at 60% volume on most devices produces about 85 dB. The WHO recommends the 60/60 rule: no more than 60% volume for no more than 60 minutes at a time. Noise-canceling headphones help because you can listen at lower volumes.
| Volume Setting | Approx. dB | Safe Daily Limit |
|---|---|---|
| 50% | 75–80 dB | Unlimited |
| 60% | ~85 dB | 8 hours |
| 70% | ~90 dB | 2.5 hours |
| 80% | 95–100 dB | 15–45 min |
| 100% | 105–110 dB | < 5 min |
Early signs include ringing or buzzing in the ears (tinnitus), muffled hearing after noise exposure, difficulty understanding speech in noisy environments, and needing to raise TV or phone volume higher than others. These signs often appear gradually over months or years.
| Stage | Symptoms | Reversibility |
|---|---|---|
| Temporary shift | Muffled hearing, tinnitus after event | Usually reversible |
| Early damage | Subtle speech clarity issues | Partially reversible |
| Permanent loss | Consistent hearing difficulty | Not reversible |
Wear earplugs rated NRR 15–30 dB. Musician-grade earplugs (NRR 12–25) reduce volume evenly without distorting sound quality. Take 15-minute breaks every hour. Stand away from speakers. A typical concert at 100–115 dB becomes 85–95 dB with NRR 20 earplugs.
| Protection Type | NRR Rating | Cost | Sound Quality |
|---|---|---|---|
| Foam plugs | 25–33 dB | $0.50–$2 | Muffled |
| Musician plugs | 12–25 dB | $15–$30 | Good |
| Custom molded | 15–30 dB | $100–$200 | Excellent |
| Over-ear muffs | 20–30 dB | $15–$50 | Muffled |
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Last Updated: Mar 9, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.