Noise Pollution Calculator: Maximal Exposure Time

Your details

NIOSH is more protective (lower limit, stricter doubling rate). OSHA is the U.S. legal minimum for workplaces. "Compare" shows results for both side by side.
The A-weighted sound pressure level at your ear, measured in decibels (dBA). A quiet office is around 50 dBA; a busy road is around 80 dBA; power tools are typically 95-110 dBA.
dBA
How many hours per day you are exposed to this noise level. Used to calculate your noise dose percentage and remaining safe time.
hours
Maximum safe exposure timeOver Limit
48 min

The longest you should be exposed to this noise level per day under the selected standard

Max time (hours)0.79h
Noise dose504%
Remaining safe timeLimit reached or exceeded
504 %
Safe<50Caution50-100Over Limit100+

You have reached or exceeded the NIOSH limit at 95 dBA.

  • NIOSH allows a maximum of 48 min per day at 95 dBA. Every 3 dB increase halves that limit.
  • Prolonged exposure above the limit significantly increases the risk of noise-induced hearing loss (NIHL), which is permanent and irreversible.
  • These limits apply to continuous steady-state noise. Impulse or impact noise (e.g. gunfire, hammering) has separate limits and requires different assessment.

Next stepReduce exposure time immediately, use engineering controls to lower the noise at source, and ensure properly fitted hearing protection is worn. Consult an occupational health specialist.

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