Question Detail
Question
If a sound intensity (I) is equal to the reference intensity (I₀), what is the loudness in decibels (L)?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The document shows: 'When I = I₀, L = 10log₁₀(I₀/I₀) = 10log₁₀(1) dB = 0 dB. The loudness at this intensity is zero decibel.'
Hint
Apply the formula L = 10log₁₀(I/I₀) when I = I₀.