Decibel Sum Calculator
Add two sound pressure levels L = 10 log₁₀(10^{L₁/10}+10^{L₂/10}).
Input Data
Input Level L₁.
dB
Input Level L₂.
dB
Results
83.0103dB
L = 10 log₁₀(10^{L₁/10}+10^{L₂/10}) = 83.0103 dB
At a glance:Decibel Sum Calculator: enter parameters to compute results; complements related calculators.
Formula
L = 10 log₁₀(10^{L₁/10} + 10^{L₂/10})
decibels are logarithmic; never add linearly
How to Use
- Enter two levels L₁, L₂ (dB).
- Get the energy-summed total level.
Case Studies
Two 80 dB sources
L = 80 + 10log₁₀2 ≈ 83.0 dB (not 160 dB).
FAQ
Equal sources?
Total = single + 3.01 dB (energy doubles).
Related Tools
References
Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.