Patent ID: 6804362
Filing Date: 2004-10-12
Classification: H04R

Abstract:
An electrostatic or electrolytic loudspeaker assembly comprising:a) a central compound diaphragm comprising: (1) an electrically-conductive layer having a first side and a second side, (2) a flexible membrane having a first surface and a second surface, wherein the first surface interfaces with the second side of said electrically-conductive layer, (3) a center electrode in electrical contact with the electrically-conductive layer, b) a front section comprising: (1) a first dielectric spacer having a grid pattern, which is bordered by a perimeter edge that is dimensioned to substantially encompass the outer perimeter of said compound diaphragm, a first side and a second side, wherein the second side interfaces with the first side of the electrically-conductive layer, (2) a first electrically insulated metal stator having a multiplicity of perforations, a first surface and a second surface, wherein the second surface interfaces with the first side of the first dielectric spacer, (3) a front electrode in electrical contact with said first metal stator, c) a rear section comprising: (1) a second dielectric spacer having a grid pattern which is bordered by a perimeter edge, that is dimensioned to substantially encompass the outer perimeter of said compound diaphragm, a first side and a second side, wherein the second side interfaces with the second surface of the flexible membrane, (2) a second metal stator having a multiplicity of perforations, a first surface and a second surface, wherein the second surface interfaces with the first side of the second dielectric spacer, (3) a rear electrode in electrical contact with said second metal stator, d) a frame assembly comprising: (1) a front structure, and (2) a rear structure that when attached to the front structure, by an attachment means, said central compound diaphragm, said front section, and said rear section are captively suspended within said frame assembly, and e) a loudspeaker driver having circuit means for: (1) interfacing with said compound diaphragm, said front section and said rear section by means of said center, front and rear electrodes, (2) receiving and processing an audio signal, (3) producing and applying a bias voltage to said compound diaphragm, and (4) producing and applying an alternating signal corresponding to the audio signal across said first and said second metal stators, which causes said diaphragm to be driven in a push-pull relation in .accordance with the excursions of the audio signal.