Patent ID: 8559660

Claim:
An electrostatic electroacoustic device comprising: a first electrode, comprising a plurality of first electrode sections which are physically separated from each other, configured to receive an audio signal; a second electrode, comprising a plurality of second electrode sections which are physically separated from each other, configured to receive the audio signal; a first electret between the first electrode and the second electrode, the first electret including at least one dielectric layer containing electrostatic charges; a second electret between the first electrode and the second electrode, the second electret including at least one dielectric layer containing electrostatic charges, wherein the first and second electrets are charged with different electrical polarity; a plurality of first spacers, wherein each of the first spacers is connected with, and between, a respective one of the first electrode sections and the first electret; a plurality of second spacers, wherein each of the second spacers is connected with, and between, a respective one of the second electrode sections and the second electret; and a conductive layer sandwiched between the first electret and the second electret, the conductive layer, the first electret and the second electret being capable of vibratory motion relative to the first electrode and the second electrode based on the audio signal.