// multi-utility computation suite · offline · instant · precise
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eng.noise-decibel Calculator
Calculates sound pressure level in dB, combined noise level from multiple sources, and distance attenuation. Sound level decreases 6 dB per doubling of distance from a point source — OSHA requires hearing protection above 85 dBA for 8-hour exposure.
Inputs
L1
Reference formula or conversion factor shown for context.
L2
Reference formula or conversion factor shown for context.
L3
Reference formula or conversion factor shown for context.
Results
combined SPL
Sample size or count used in the calculation.
dominant source
Sample size or count used in the calculation.
sources combined
Sample size or count used in the calculation.
rating
A standardised quality or risk rating on the applicable scale.