This formula is a template, for inclusion into pages about Acoustics. Use the following syntax to include it:
{{:Acoustics/formulas/Max efficiency}}
η max = 1 − 2 k e f f Q E Q m 0 ( k e f f Q E Q m 0 ≪ 1 ) {\displaystyle \eta _{\max }=1-{\frac {2}{k_{\mathrm {eff} }{\sqrt {Q_{E}Q_{m0}}}}}\qquad \left(k_{\mathrm {eff} }{\sqrt {Q_{E}Q_{m0}}}\ll 1\right)}
