Noise Pollution Calculator
Assess noise exposure levels by combining multiple noise sources and comparing to health guidelines.
dB
dB
hours
feet
Combined Noise Level
70.4 dB
Level at Distance46.0 dB
vs WHO Limit (65 dB)-19.0 dB above/below
Safe Exposure at This Level65,885.9 hours
Combined Noise Level vs Primary Noise Source
How to Calculate Noise Pollution
Noise levels are measured in decibels (dB) on a logarithmic scale.
Combining Sources
Combined dB = 10 * log10(10^(dB1/10) + 10^(dB2/10))
Distance Attenuation
dB at distance = Source dB - 20 * log10(distance / reference)
Reference Levels
Example Calculation
A 70 dB traffic noise and 60 dB HVAC system, 8 hours exposure at 50 feet.
- 01Combined: 10 * log10(10^7 + 10^6) = 10 * log10(11,000,000) = 70.4 dB
- 02At 50 ft: 70.4 - 20 * log10(50/3) = 70.4 - 24.4 = 46.0 dB
- 03vs WHO: 46.0 - 65 = -19.0 dB (below limit)