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Level Drop Calculator

Compute level drop ΔL = 20·log₁₀(r₁/r₂) between two distances.

Input Data

Input Distance r₁.
m
Input Distance r₂.
m

Results

-6.0206dB
ΔL = 20·log₁₀(r₁/r₂).

At a glance:Level Drop Calculator: enter parameters to compute results; complements related calculators.

Formula

ΔL = 20·log₁₀(r₁ / r₂).

How to Use

  1. Enter two distances.
  2. It returns the level change (dB).

Case Studies

r₁=1, r₂=2 → ΔL≈−6.02 dB

20·log₁₀(0.5) ≈ −6.0206 dB.

FAQ

Drop per doubling?

ΔL = 20·log₁₀(0.5) ≈ −6.02 dB for a point source in free field.

Related Tools

References

Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.

Found a problem with the results?

If this calculator's result is wrong, or you have any question about the calculation logic, please let us know. You are viewing:Level Drop Calculator（/acoustics/level-drop-distance）。