APFIVE Sound Intensity Logarithmic Model
The loudness L of a sound in decibels is modeled by L = 10·log(I/I₀), where I is the intensity and I₀ is a reference intensity. If a sound has L = 40 dB when I = 10^(-8) W/m², what is the reference intensity I₀?
A
I₀ = 10^(-12) W/m²
B
I₀ = 10^(-8) W/m²
C
I₀ = 10^(-4) W/m²
D
I₀ = 4 × 10^(-9) W/m²
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