Translations:Useful attenuation mechanisms/8/en

${\begin{aligned}A={\rm {\ exp\ }}\left[-{\frac {\pi x}{Q\lambda }}\right]={\rm {\ exp\ }}\left[-{\frac {\pi fx}{QV}}\right]={\rm {\ exp\ }}\left[-{\frac {\pi ft}{Q}}\right].\end{aligned}}$

(6)