Sound tools

Noise exposure calculator

Estimate daily occupational noise dose using NIOSH or OSHA exchange-rate formulas.

Free to use
Runs on this device
No account

Exposure guideline

NIOSH REL: 85 dBA / 8 h / 3 dB · OSHA PEL: 90 dBA / 8 h / 5 dB

Sound level

85 dBA

Duration

8 h

Estimated daily dose100%

Time to 100% dose8 h

Approaching the selected daily occupational reference dose.

Procedure

Select the NIOSH or OSHA model required for the comparison.
Set one sound level and one exposure duration.
Read the estimated dose and time to 100%. Follow the rules for your location and workplace.

Function

Estimate limits

This calculator covers one exposure segment. It cannot establish compliance, replace a dosimeter, or combine a variable work shift. NIOSH and OSHA use different assumptions.

Browser support

Use a current version of Safari, Chrome, Edge, or Firefox. Microphone tools require HTTPS and microphone permission.

Technical sources

CDC/NIOSH Noise and Occupational Hearing Loss OSHA Occupational Noise Exposure