Sound Source
10⁻¹² W10⁶ W
0.1 m1000 m
dB Level
39.0
dB SPL
Intensity
7.96e-9
W/m²
Distance
10.0
meters
Power
1.00e-5
watts
OSHA Safe Exposure: Safe for extended exposure
◆ Challenge 1 / 3
At what distance does a Jet Engine drop to 85 dB?
Target: 85 dB · Source: Jet Engine
Current dB:
39.0 dB
@ 10.0 m
Physics
Intensity:
I = P / (4π·r²)
I = P / (4π·r²)
Sound Level:
dB = 10·log₁₀(I / I₀)
I₀ = 10⁻¹² W/m²
dB = 10·log₁₀(I / I₀)
I₀ = 10⁻¹² W/m²
Distance Rule:
Each doubling of distance: −6 dB
Each doubling of distance: −6 dB