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THE FEUTEX TOOLKIT

Combine Two Sound Levels

Add two uncorrelated sound levels using their intensity contributions.

Audio workspace● Runs in your browser
01 Your input
02 Your result
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FormulaCombined level = 10*log10(10**(a/10)+10**(b/10)); Increase over louder source = 10*log10(10**(a/10)+10**(b/10))-max(a,b)
Sources and model references

Worked example

Inputs

First level
60 dB
Second level
60 dB

Expected results

Combined level
63.01029996 dB
Increase over louder source
3.010299957 dB

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Add two uncorrelated sound levels using their intensity contributions.
  2. Set first level, second level in the indicated units.
  3. Calculate and compare combined level, increase over louder source.

Try this example

{
  "a": 60,
  "b": 60
}

Accuracy and scope

Idealized educational model. Enter measured values in the displayed units; real systems may require additional corrections.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.