Question

The intensity of sound made by a jet engine from 100 feet away is 100.5 watts per square meter.Find the decibel level given that lo=10-¹2.O 13O 125O 11O 115

Answer 1

$\begin{gathered} D=10log(\frac{I}{Io}) \\ \\ D=10log(\frac{10^{0.5}}{10^{\text{ -12}\frac{}{}}}) \\ \\ D=10log(10^{11.5}) \\ D=10(11.5)=115 \end{gathered}$

The answer would be 115