For First Responders · Sound Levels (dB)
Sound Levels (dB) for a sound barrier
Built for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field. Simulate a sound barrier live below — adjust the inputs and watch it respond, right in your browser.
Sound Levels (dB SPL)Live
adding & spreading loudness
Controls
Presets
Decibels are logarithmic, so loudness does not add the way you expect: two identical sources are only 3 dB louder than one, and ten are 10 dB. Meanwhile a point source drops 6 dB every time the distance doubles (the inverse-square law). Sustained exposure above 85 dB risks hearing damage.
Data Inspector
Combined at 1 m85.0 dB
At 4 m73.0 dB
Doubling sources+3 dB
Risksafe range
Governing equation
Reading this result: A single source falls from 85 dB to 73 dB across 4 m — about 6 dB lost each time the distance doubles.
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
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Frequently asked questions
- Is this good for first responders?
- Yes — this version of "Sound Levels (dB) for a sound barrier" is framed for first responders planning or training for real incidents. Run fast what-if scenarios for response planning and training — no software to install in the field.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.