Tools
Calculators and interactive apps for occupational hygiene — some built from others’ published work, all credited within. Web apps open in a new tab; Excel tools download a spreadsheet.
Web appCalculate how many samples you need to apply the EN 689 statistical test. Incorporates the Preliminary Tests and the ExpoStats algorithm to simulate thousands of scenarios and find how many samples make you 80% confident of compliance.
Launch tool ↗
Web appAn interactive tool showcasing how historical data can be used to build informative priors for Bayesian exposure assessment.
Launch tool ↗
ExcelEstimate hearing threshold shifts associated with age and noise exposure, based on the ISO 1999 calculations.
Download .xlsx ↓
ExcelUse the sample size and largest result to determine compliance — a very simple, but surprisingly powerful tool.
Download .xlsx ↓
ExcelA basic version of NDExpo replicated in Excel for handling non-detects — mind the limitations noted inside the file.
Download .xlsx ↓