FOLDED ELECTROSTATIC SPEAKER
The invention is directed to a folded electrostatic speaker. An exemplary speaker comprises: a first membrane; a first electrode; a second membrane, at least a portion of the first membrane being connected to at least a portion of the second membrane; a second electrode; and a first opening defined between at least a portion of the first and second membranes for receiving and releasing air. At least a portion of the first membrane and at least a portion of the second membrane move substantially perpendicularly to at least a portion of the first opening. At least a portion of the first membrane moves towards at least a portion of the second membrane or away from at least a portion of the second membrane.
1 . A folded electrostatic speaker comprising:
a first membrane;
a first electrode, wherein the first electrode is substantially parallel to at least a portion of the first membrane;
a second membrane, at least a portion of the first membrane being connected to at least a portion of the second membrane;
a second electrode, wherein the second electrode is substantially parallel to the second membrane;
a first opening defined between at least a portion of the first membrane and at least a portion of the second membrane for receiving and releasing air;
wherein a first polarization voltage is applied between the first membrane and the first electrode;
wherein a second polarization voltage is applied between the second membrane and the second electrode;
wherein at least a portion of the first membrane and at least a portion of the second membrane move substantially perpendicularly to at least a portion of the first opening; and
wherein at least a portion of the first membrane moves towards at least a portion of the second membrane or away from at least a portion of the second membrane.
2 . The speaker of claim 1 , wherein at least one of at least a portion of the first membrane or at least a portion of the second membrane is rotatable about at least a portion of the first opening.
3 . The speaker of claim 1 , wherein the first polarization voltage produces an attractive or repulsive force between at least a portion of the first membrane and the first electrode.
4 . The speaker of claim 3 , wherein the first polarization voltage comprises a static polarization voltage, and wherein the attractive or repulsive force comprises a static attractive or repulsive force.
5 . The speaker of claim 1 , wherein the speaker produces acoustic sound when at least a portion of the first membrane moves towards at least a portion of the second membrane or away from at least a portion of the second membrane.
6 . The speaker of claim 5 , wherein the acoustic sound is based on a dynamic audio signal.
7 . The speaker of claim 1 , wherein at least a portion of the first membrane moves towards at least a portion of the second membrane when air is released from at least a portion of the first opening, and wherein at least a portion of the first membrane moves away from at least a portion of the second membrane when air is received into at least a portion of the first opening.
8 . The speaker of claim 1 , wherein the speaker comprises an ear speaker.
9 . The speaker of claim 1 , wherein the speaker comprises a loud speaker.
10 . The speaker of claim 1 , wherein a distance between at least a portion of the first membrane and the first electrode is less than or equal to a predetermined distance.
11 . The speaker of claim 1 , wherein the first polarization voltage is the same as, less than, or greater than the second polarization voltage, and wherein the first polarization voltage is less than or equal to a predetermined voltage.
12 . The speaker of claim 1 , wherein the first polarization voltage is applied using an external voltage source.
13 . The speaker of claim 1 , wherein the first polarization voltage is applied using an electret.
14 . The speaker of claim 1 , wherein an area associated with at least one of a portion of the first membrane or at least a portion of the second membrane is greater than an area associated with at least a portion of the first opening.
15 . The speaker of claim 1 , wherein the speaker is packaged into an electrical package.
16 . The speaker of claim 1 , wherein a depth of the speaker is less than or equal to a wavelength associated with a frequency associated with sound produced from the speaker.
17 . The speaker of claim 16 , wherein the frequency comprises a maximum frequency.
18 . The speaker of claim 1 , wherein the speaker does not comprise a magnet.
19 . The speaker of claim 1 , wherein the speaker comprises at least one of a magnetometer or a compass.
20 . A method for providing a folded electrostatic speaker, the method comprising:
providing a first membrane;
providing a first electrode, wherein the first electrode is substantially parallel to at least a portion of the first membrane;
providing a second membrane;
connecting at least a portion of the first membrane to at least a portion of the second membrane;
providing a second electrode, wherein the second electrode is substantially parallel to at least a portion of the second membrane;
applying a first polarization voltage between the first membrane and the first electrode;
applying a second polarization voltage between the second membrane and the second electrode,
wherein a first opening is defined between at least a portion of the first membrane and at least a portion of the second membrane,
wherein at least a portion of the first membrane and at least a portion of the second membrane move substantially perpendicularly to the first opening, and
wherein at least a portion of the first membrane moves towards at least a portion of the second membrane or away from the second membrane.