Solve for L_p
L_{p}=20\log(\frac{P}{P_{0}})
\left(P<0\text{ and }P_{0}<0\right)\text{ or }\left(P>0\text{ and }P_{0}>0\right)
Solve for P
P=P_{0}\times 10^{\frac{L_{p}}{20}}
P_{0}\neq 0
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