A V d e c = A V c / g 30 {\displaystyle AV_{dec}={\frac {AV_{c/g}}{30}}}
A V c / g = 30 A V d e c i m a l e {\displaystyle AV_{c/g}=30\,AV_{decimale}}
A V l o g = − l o g ( A V d e c ) {\displaystyle AV_{log}=-log(AV_{dec})\,}
A V d e c = 10 − A V l o g {\displaystyle AV_{dec}=10^{-AV_{log}}}
f = F A n {\displaystyle f={\frac {F}{An}}}
All is Stub!!!