AKUSTISK TRANSDUCER MED FORBEDRET ELEKTRODEAFSTAND

摘要

Acoustic transducer with installation of an electret unit in order to create a cavity 32 between a fixed electrode consisting of a back plate 28 attached to a support ring 25, and a moveable electrode consisting of a membrane 22 in which the cavity 32 reduces the capacity between peripheral stationary parts of the membrane 22 and the back plate 28. <IMAGE>