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Hearing Exposure Calculator
Screen combined daily A-weighted noise segments under NIOSH or OSHA dose assumptions.
Occupational screening only—not medical advice or a compliance determination. Real decisions require calibrated measurements, correct instrument settings, task coverage, and qualified safety review. This simple model does not evaluate impulse/impact peaks, frequency content, hearing-protector fit, protection variability, ototoxic exposures, or individual susceptibility. Do not subtract a labeled protector rating from measurements without an appropriate assessment. Sudden hearing loss, severe ear symptoms, or symptoms after a blast warrant prompt medical evaluation; use emergency services for an immediate emergency.
Exposure segments
Use A-weighted equivalent/average levels for continuous segments. Up to 200 rows, 40–140 dBA, 0.001–1,440 minutes each, and no more than 1,440 entered minutes total.
Screening result
—combined daily dose
—dose-equivalent 8 h TWA
—energy Leq of entered time
—included / entered time
| Segment | Level | Duration | Threshold | Allowable time | Dose contribution | Formula audit |
|---|