sci.decibel-addition Calculator
Calculates the combined decibel level of multiple incoherent sound sources using logarithmic addition: L_total = 10 log₁₀(Σ10^(Lᵢ/10)). Adding two identical sources adds 3 dB — ten identical sources add 10 dB; doubling perceived loudness requires approximately +10 dB.
Inputs
- Level1 Db
- Reference formula or conversion factor shown for context.
- Level2 Db
- Reference formula or conversion factor shown for context.
- Level3 Db
- Reference formula or conversion factor shown for context.
Results
- combined SPL (dB)
- Sample size or count used in the calculation.
- two equal sources
- Reference formula or conversion factor shown for context.
- L1
- Reference formula or conversion factor shown for context.
- L2
- Reference formula or conversion factor shown for context.
- Ltotal = 10·log(Σ 10^(Li/10))
- The combined total across all inputs and components.
combined decibel first equal addition