The article describes in detail the condenser microphone’s equivalent circuit by supplying all the mathematical steps leading to the general solution consisting of two parts: the transitory and steady-state solutions. A significant part of this work was devoted to the mathematical procedure oriented to obtain the expression of the steady-state solution according to E.C. Wente.

The aim of this work is to transform the general rigorous solution from a closed-form into an open one suitable to be utilized in the numerical calculus and to compare the two above mentioned steady-state solutions, slightly different inbetween, due to the different approaches and approximations.