Decibel chart & occupational noise-dose reference
Explore approximate sound levels and the NIOSH formula for a continuous workplace exposure. Actual levels vary, and the result is not a personal or recreational safe-time limit.
- 30 dB Example: a quiet library or soft whisper
- 50 dB Example: a quiet home or light rain
- 60 dB Example: conversation at a typical distance
- 70 dB Example: some washing machines or busy offices
- 80 dB Example: some busy restaurants or traffic
- 85 dB NIOSH occupational REL: 8-hour time-weighted average
- 95 dB Example: some motorcycles or subway platforms
- 100 dB Example: some hand dryers or amplified venues
- 110 dB Example: some concerts or chainsaws
- 120 dB Example: a nearby siren or thunderclap
- 130 dB Example: a jackhammer at close range
- 140 dB Example: some impulse sounds at close range
This calculation applies the NIOSH recommended occupational exposure limit: 85 dBA as an eight-hour time-weighted average, with allowable workplace exposure time halved for each 3 dBA increase. NIOSH says this limit assumes quieter time away from work and is not a recommendation for general environmental or recreational noise. It also does not guarantee zero risk. Sound examples above are approximate; distance, measurement method, duration, repetition and other exposure during the day all matter. Read the CDC/NIOSH explanation →