Decibel Addition Calculator

Calculate the combined dB level of multiple sound sources. Includes perceived loudness change and hearing safety assessment.

Sound Source 1

Sound Source 2

Add Third Source

Tab to move between fields

Combined Level

83 dB

Increase from Loudest3 dB

Perceived Loudness Change23% louder

Safety AssessmentCaution — prolonged exposure may cause damage

Max Safe Exposure8 hours

Comparable SoundLawn mower

How to Use This Calculator

Enter Sound Source 1, Sound Source 2, and Add Third Source.
Set Sound Source 3.
Review the Combined Level (dB) result.
Use Increase from Loudest (dB) and Perceived Loudness Change to inform your decision.

How the result changes with Sound Source 1

Identify Input Parameters
4 parameters
Sound Source 1 = 80, Sound Source 2 = 80, Add Third Source = 0, Sound Source 3 = 75 = 4 input(s) provided
Calculate Combined Level
Combined Level
83 = 83
Calculate Increase from Loudest
Increase from Loudest
3 = 3
Calculate Perceived Loudness Change
Perceived Loudness Change = `${perceivedPercent
23% louder = 23% louder

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