Question

Intensity level of a sound of intensity I is 30 dB. The ratio $\frac{I}{I_{0}}$ is (Where $I_{0}$ is the threshold of hearing)

• A. 3000
• B. 1000
• C. 300
• D. 30

Answer 1

Answer: (B)

1000

Answer 2

$L = 10\log_{10}\left( \frac{I}{I_{0}} \right) = 30 \Rightarrow \frac{I}{I_{0}} = 10^{3}$