SOUND TOOLS
Noise dose calculator
Compare educational NIOSH and OSHA daily noise-dose estimates from levels and exposure durations.
Ready when you are
NIOSH
OSHA
Both models count inputs of 80 dBA or more. Criterion levels and exchange rates differ. This is not compliance certification.
NIOSH: 85 dBA / 8 h / 3 dB. OSHA: 90 dBA / 8 h / 5 dB. ≥80 dBA. OSHA Appendix A
01 / Meter
How to use this tool
- Enter A-weighted levels from a trusted calibrated meter.
- Add the actual hours spent at each level.
- Calculate both models and review assumptions.
02 / FAQ
Frequently asked questions
Why do NIOSH and OSHA differ?
NIOSH uses 85 dBA for 8 hours with a 3 dB exchange; OSHA uses 90 dBA and a 5 dB exchange, with different thresholds.
What are the limits?
Models do not certify compliance or safety. Uncalibrated input readings cannot establish safe exposure.
03 / IPHONE APP
Keep your noise checks together
dB Pulse: Decibel Meter is for iPhone with iOS 26+. Keep track of daily noise dose, sustained-noise alarms, saved sessions, Lock Screen Live Activity and widgets.
Pro adds advanced alarms, a spectrum analyzer, unlimited history, report export, session notes, supported microphone profile matching and an Apple Watch meter.
Back to the meter ↗