Science & Environment
Noise Pollution Inverse-Square Attenuation Calculator
Calculate sound pressure level attenuation with distance using the inverse-square law.
Your inputs
Change any value to update the result instantly.
Sound level at target distance
70 dB
Attenuation
20 dB
Reference level
90 dB
Distance ratio
10
Formula and working
L2 = L1 − 20 × log10(d2 ÷ d1)
- 1
Collect the inputs
Source sound level = 90 dB; Reference distance = 1 m; Target distance = 10 m
- 2
Apply the formula
L2 = L1 − 20 × log10(d2 ÷ d1)
- 3
Result
Sound level at target distance = 70 dB
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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