Sound level (dB)
Enter your numbers — the results update instantly.
Combined level83.01 dB
Level at distance 260 dB
Formula
L = 20·log₁₀(p₂/p₁)
Worked example
Given: Sound level = 80 dB; Number of sources = 2; Distance 1 = 1 m; Distance 2 = 10 m
Result: Combined level = 83.01 dB; Level at distance 2 = 60 dB
How it is calculated
1. Enter the values you know. 2. The calculator converts them to base units and applies the formula. 3. The result is shown in the unit you choose.
Frequently asked questions
How do I calculate it?
Formula: L = 20·log₁₀(p₂/p₁). Given: Sound level = 80 dB; Number of sources = 2; Distance 1 = 1 m; Distance 2 = 10 m. Result: Combined level = 83.01 dB; Level at distance 2 = 60 dB.
Is the calculator free and private?
Yes. It is free, needs no sign-up and runs in your browser — the numbers you type stay on your device.