Electrostatic microphone
First Claim
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1. An electrostatic microphone comprising:
- an electrically conductive diaphragm,a stationary electrode plate,a supporting member including a central projection upon which said stationary electrode plate is mounted, at least a pair of resilient supporting members which are disposed on opposite sides of said stationary electrode plate for holding the same in cooperation with said central projection, and an annular projection surrounding said central projection and adapted to support said electrically conductive diaphragm, said central and annular projections defining an air chamber communicated with an air gap between said electrically conductive diaphragm and said stationary electrode plate at the peripheral portion of said air gap.
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Abstract
A condenser microphone includes a diaphragm, a stationary electrode and a supporting member which supports the diaphragm and the electrode in spaced parallel relationship. The supporting member is provided with an inner annular projection adapted to support the stationary electrode and an outer annular projection for supporting the diaphragm. An air chamber is defined between the inner and outer annular projections and communicated with an air gap between the diaphragm and the stationary electrode at the periphery of the air gap.
40 Citations
21 Claims
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1. An electrostatic microphone comprising:
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an electrically conductive diaphragm, a stationary electrode plate, a supporting member including a central projection upon which said stationary electrode plate is mounted, at least a pair of resilient supporting members which are disposed on opposite sides of said stationary electrode plate for holding the same in cooperation with said central projection, and an annular projection surrounding said central projection and adapted to support said electrically conductive diaphragm, said central and annular projections defining an air chamber communicated with an air gap between said electrically conductive diaphragm and said stationary electrode plate at the peripheral portion of said air gap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An electrostatic microphone comprising:
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an electrically conductive diaphragm; a stationary electrode plate; a supporting member for supporting said diaphragm substantially in parallel with said stationary electrode plate; and means for defining an air chamber communicated with an air gap between said vibrating diaphragm and said stationary electrode plate at the peripheral portion of said air gap, wherein said supporting member includes a central projection upon which said stationary electrode plate is mounted, a first annular projection surrounding said central projection containing said stationary electrode plate, and a second annular projection surrounding said first projection and adapted to support said diaphragm, said first and second annular projection defining said air chamber. - View Dependent Claims (17)
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18. An electrostatic microphone comprising:
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an electrically conductive diaphragm; a stationary electrode plate; a supporting member for supporting said diaphragm substantially in parallel with said stationary electrode plate; and means for defining an air chamber communicated with an air gap between said vibrating diaphragm and said stationary electrode plate at the peripheral portion of said air gap; a circuit device having a housing integrally molded with said supporting member and including a field effect transistor impedance converting means having a gate electrode with its end shaped wavy for resiliently engaging said stationary electrode plate, for converting a high impedance of a capacitor constituted by said diaphragm and said stationary electrode plate into a lower impedance.
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19. An electrostatic microphone comprising:
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an electrically conductive diaphragm; a stationary electrode plate; a supporting member for supporting said diaphragm substantially in parallel with said stationary electrode plate, said supporting member including a central projection upon which said stationary electrode plate is mounted, at least one pair of resilient supporting members which are disposed on opposite sides of said stationary electrode plate for holding the same in cooperation with said central projection, and an annular projection surrounding said central projection and adapted to support said vibrating plate, said central and annular projections defining an air chamber communicated with an air gap between said vibrating diaphragm and said stationary electrode plate at the peripheral portion of said air gap. - View Dependent Claims (20)
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21. An electrostatic microphone comprising:
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an electrically conductive diaphragm; a stationary electrode plate; a supporting member for supporting said diaphragm substantially in parallel with said stationary electrode plate, said supporting member provided with a recess; means for defining an air chamber communicated with an air gap between said vibrating diaphragm and said stationary electrode plate at the peripheral portion of said air gap; and a circuit device taking the form of a frustum and received within said recess of said supporting member which is tapered to receive said circuit device, said circuit device including an impedance converting means which is electrically connected to said stationary electrode plate for converting a high impedance of a capacitor constituted by said diaphragm and said stationary electrode plate into a low impedance.
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Specification