Home/Basic Physics/Sound/Sound intensity14. SoundSound intensityIn 14. SoundFormulaCopy LaTeXI=PAI=\frac{P}{A}I=APFor spherical propagationCopy LaTeXI=P4πr2I=\frac{P}{4\pi r^2}I=4πr2PTagsphysicsphysics formulawavessoundDetailSound intensity is acoustic power per unit area.Found an error? Contact us.Related formulasRelatedIntensity of a waveI=PAI=\frac{P}{A}I=APOpen formulaOpen in sectionRelatedSound intensity levelβ=10log10(II0)\beta=10\log_{10}\left(\frac{I}{I_0}\right)β=10log10(I0I)Open formulaOpen in section