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