C-V-testing of electret transducers
N.S. Shchelko, I. M. Sokolova, V.I. Zakrzhevskiy · 2002
A non-destructive method for electret transducers testing is suggested and discussed. The method allows to determine electret-transducers (microphone, telephone, etc.) insert parameters, e.g. electret surface potential air gap width, membrane tension and deflection. The method is based on the insert C-V-characteristic measurements. C-V-testing method can be also used in investigation of electromechanical properties of two roughed surfaces contact, one of the surfaces being dielectric (electret) and allows to optimize the transducer's geometry and surface potential value.