Patent ID: 6188772
Filing Date: 2001-02-13
Classification: H04R

Abstract:
An electrostatic speaker device, comprising:a first foam stator having an interior surface;a second foam stator having an interior surface positioned adjacent to the interior surface of the first stator, at least one of said first and second foam stators being acoustically transparent;said interior surfaces of the first and second foam stators including electrically conductive cellular structure sufficiently small in cell size to develop a substantially continuous electrostatic charge dispersion across the respective first and second interior surfaces;at least one diaphragm disposed between the first and second foam stators, said diaphragm including an electrically conductive layer responsive to electrostatic forces developed by the respective first and second stators in push-pull operation;means for providing an electrical charge on the at least one diaphragm; andelectrical contacts coupled to the first and second foam stators for attachment to a signal source operable to supply voltage at the respective first and second stators to provide a push-pull drive configuration for the at least one diaphragm as an active speaker element.