CN113596691A - Hollow electrostatic loudspeaker with passive radiation structure - Google Patents
Hollow electrostatic loudspeaker with passive radiation structure Download PDFInfo
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- CN113596691A CN113596691A CN202110796388.0A CN202110796388A CN113596691A CN 113596691 A CN113596691 A CN 113596691A CN 202110796388 A CN202110796388 A CN 202110796388A CN 113596691 A CN113596691 A CN 113596691A
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- diaphragm
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/02—Loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The invention provides a hollow electrostatic loudspeaker with a passive radiation structure, which comprises a first damper, a first hollow electrode plate, a first outer ring diaphragm bracket, a first inner ring diaphragm bracket, a hollow electrostatic diaphragm, a passive radiation diaphragm, a second inner ring diaphragm bracket, a second outer ring diaphragm bracket, a second hollow electrode plate and a second damper which are assembled in sequence, wherein the first hollow electrode plate, the first outer ring diaphragm bracket, the first inner ring diaphragm bracket, the hollow electrostatic diaphragm, the second inner ring diaphragm bracket, the second outer ring diaphragm bracket and the second hollow electrode plate with a hole form the electrostatic loudspeaker structure; first damping, first inner ring vibrating diaphragm support, passively radiate the vibrating diaphragm, second inner ring radiation support and second damping form bass passive radiation structure jointly, produce bigger acoustic power under equal thickness and area condition, promote the bass radiation acoustic pressure and the developments upper limit of electrostatic speaker, improve the problem of the electrostatic vibrating diaphragm that traditional electrostatic speaker unit leads to because of high-power drive and polar plate actuation short circuit, the power drive upper limit of electrostatic speaker unit has been improved, and the reverberation time and the response effect of aforementioned bass signal have been optimized.
Description
Technical Field
The invention relates to the technical field of audio playback, in particular to a hollow electrostatic loudspeaker with a passive radiation structure.
Background
The existing loudspeakers are divided into moving-coil loudspeakers, moving-iron loudspeakers, constant-magnetic loudspeakers and electrostatic transducers according to the structural principle; the electrostatic loudspeaker is used as a core device of high-end audio and video products in the current market, is commonly used on equipment such as a headphone, a sound box and the like, and has the sound amplification principle that a conductive vibrating diaphragm is arranged in a fixed electrode plate to form a flat plate type capacitor structure.
In terms of performance, the vibrating diaphragm of the electrostatic loudspeaker is very light and thin, has extremely small mass, and even can ignore inertial motion and cutting vibration of the diaphragm, so the vibrating diaphragm has good dynamic response capability and tiny signal revealing force; meanwhile, due to the fact that the area of a large vibration system is obtained, the effective vibration area of the vibration system is more than 4 times that of a traditional moving coil energy conversion structure, and therefore the vibration system is easier to form a large intracranial sound field effect and a more natural intracranial virtual image.
Certainly, the electrostatic loudspeaker has corresponding defects and problems, the traditional large-size electrostatic loudspeaker vibrates by depending on the vibrating diaphragm loaded with a high-voltage direct-current power supply, and the center point of the charged vibrating diaphragm can generate large displacement because the support only fixes the vibrating diaphragm on the outer edge of the vibrating diaphragm; when a bass signal with larger power and dynamic is replayed, the charged diaphragm is easy to be attracted and burnt with the alternating-current high-voltage pole plates on the two sides under the action of larger coulomb force. Therefore, the conventional electrostatic speaker avoids this problem by increasing the surface tension of the diaphragm and limiting the amplitude of the diaphragm.
At the same time, however, the higher surface tension increases the surface stiffness of the diaphragm, which reduces the degree of diaphragm displacement and flexural deformation of the electrostatic speaker, and does not drive a sufficient amount of air under the same voltage driving condition. Therefore, it is difficult to generate sufficient sound pressure and dynamic range in a low-frequency region requiring huge power, resulting in poor response performance of low-frequency signals, and severely limiting the upper limit of the sound power of each frequency end of the electrostatic speaker and the application scene.
In short, the acoustic power and the frequency response performance of the traditional electrostatic loudspeaker are determined by the amplitude displacement of the vibrating diaphragm, the surface tension of the vibrating diaphragm and the size of the vibrating diaphragm together, and according to the coulomb law, the increase of the amplitude displacement of the vibrating diaphragm can cause the reduction of coulomb force of an electrostatic field, and the overall power and the sensitivity of the electrostatic vibrating diaphragm are reduced; the sound pressure in a low-frequency area is severely restricted by increasing the surface tension, and the edge restriction of the vibrating diaphragm is weakened by reducing the surface tension, so that larger flexural deformation and displacement are generated; and increase the vibrating diaphragm size, can improve the regional acoustic pressure of low frequency, nevertheless can multiply increase vibrating diaphragm amplitude displacement, easily lead to the vibrating diaphragm to miss the touch plate under high-power and burn out.
At present, the traditional full-size electrostatic unit cannot improve the acoustic power and the response performance of the electrostatic unit from the three parameters at the same time, and negative implication is certainly generated.
Therefore, there is a need for an improved structure of a hollow electrostatic speaker with a passive radiating structure to solve the above-mentioned technical problems.
Disclosure of Invention
In order to solve the technical problems, the invention provides a hollow electrostatic loudspeaker with a passive radiation structure, which is used for solving the restriction problems of the traditional full-size electrostatic unit in three aspects of vibration diaphragm amplitude displacement, vibration diaphragm surface tension and vibration diaphragm size; and the acoustic power of the electrostatic unit over the full frequency band.
The invention provides a hollow electrostatic loudspeaker with a passive radiation structure, which comprises a first damper, a second damper, a first hollow electrode plate with a hole, a second hollow electrode plate with a hole, a first outer ring vibrating diaphragm bracket, a second outer ring vibrating diaphragm bracket, a first inner ring vibrating diaphragm bracket, a second inner ring vibrating diaphragm bracket, a hollow electrostatic vibrating diaphragm and a passive radiation vibrating diaphragm, wherein conductive coatings are formed on the surfaces of two sides of the hollow electrostatic vibrating diaphragm. Meanwhile, the first damper, the first hollow electrode plate with the hole, the first outer ring diaphragm support, the first inner ring diaphragm support, the hollow electrostatic diaphragm, the passive radiation diaphragm, the second inner ring diaphragm support, the second outer ring diaphragm support, the second hollow electrode plate with the hole and the second damper are assembled in sequence. The method is characterized in that: the porous first hollow electrode plate, the first outer ring diaphragm support, the first inner ring diaphragm support, the hollow electrostatic diaphragm, the second inner ring diaphragm support, the second outer ring diaphragm support and the porous second hollow electrode plate jointly form an active electrostatic loudspeaking structure; the first damper, the first inner ring diaphragm support, the passive radiation diaphragm, the second inner ring radiation support and the second damper form a passive radiation structure together.
Preferably, the first hollow electrode plate, the first outer ring diaphragm support, the hollow electrostatic diaphragm, the second outer ring diaphragm support and the second hollow electrode plate are all circular, have equal radii, are coincident in circle center and are coaxially arranged; the first damper, the first inner ring diaphragm support, the passive radiation diaphragm, the second inner ring diaphragm support and the second damper are circular, have equal radiuses, are superposed and are coaxially arranged; the hollow electrostatic vibrating diaphragm and the passive radiation vibrating diaphragm are in the same plane and coaxially arranged.
Preferably, the first hollow electrode plate, the hollow electrostatic diaphragm and the second hollow electrode plate are hollow and annular, and the diameters of the hollow areas are equal to or slightly smaller than the outer diameters of the first damper, the first inner ring diaphragm support, the passive radiation diaphragm, the second inner ring diaphragm support and the second damper.
Preferably, the first outer ring diaphragm support and the second outer ring diaphragm support are both provided with a conductive coating on one side facing the hollow electrostatic diaphragm, and the conductive coatings have the same shape and area.
Preferably, the punched holes of the first hollow electrode plate and the second hollow electrode plate are uniformly distributed in a round shape, the hole areas on the surfaces of the first hollow electrode plate and the second hollow electrode plate are the same, and the hole opening rate is 60-85%
Preferably, the diameter of each round punched hole on the first hollow electrode plate and the second hollow electrode plate is 0.8mm-3 mm.
Preferably, the passive radiation diaphragm is made of a non-conductive film material, and a flexible suspended edge structure is formed at an edge portion of the passive radiation diaphragm and is fixed to the first inner ring diaphragm support and the second inner ring diaphragm support.
Preferably, the surface tension of the hollow electrostatic diaphragm is 1kPa-5kPa, the surface stress of the passive radiation diaphragm is zero, and the passive radiation diaphragm is in an unstressed state.
Preferably, the first hollow electrode plate, the first outer ring diaphragm support, the first inner ring diaphragm support, the second outer ring diaphragm support and the second hollow electrode plate are all PCB plates, and no conductive structure is formed on the surfaces of the first inner ring diaphragm support and the second inner ring diaphragm support.
Preferably, the first damper and the second damper are both made of porous sound-absorbing materials.
Compared with the related art, the hollow electrostatic loudspeaker with the passive radiation structure provided by the invention has the following beneficial effects:
the invention has reasonable design, changes the traditional fixed diaphragm with single side at the edge into the hollow diaphragm with internal and external fixed at two sides, and changes the traditional single-static diaphragm full-frequency playback system into the combined playback system of the driving hollow diaphragm and the driven radiation diaphragm. Compared with the traditional electrostatic loudspeaker, the design of the invention separates and processes the low-frequency signal with larger sound power and longer displacement stroke from the problem of full-band music playback, and the passive radiation diaphragm with the flexible suspension edge is used for radiating the low-frequency signal with high power and high cavity pressure; the hollow electrostatic diaphragm with higher rigidity, uniform surface stress and annular internal and external fixation is used for replaying high-frequency signals with smaller amplitude displacement. The sound power bearing performance and the bass response bandwidth performance of the high-frequency-ratio low-frequency-ratio sound-absorbing unit are obviously superior to those of a traditional full-size electrostatic loudspeaker, and the high-frequency-ratio low-frequency-ratio high-frequency-ratio low-frequency-ratio sound-absorbing unit can obtain longer low-frequency reverberation time and more natural low-frequency rebound effect under the condition of the same unit volume due to the fact that the passive radiation diaphragm is used for controlling the discharge of the unit low-frequency cavity pressure.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
FIG. 2 is a schematic view of a passive radiation diaphragm structure according to the present invention
1. The device comprises a hollow electrostatic diaphragm, 2, a passive radiation diaphragm, 3, a first hollow electrode plate, 4, a second hollow electrode plate, 5, a first outer ring diaphragm support, 6, a second outer ring diaphragm support, 7, a first inner ring diaphragm support, 8, a second inner ring diaphragm support, 9, first damping, 10 and second damping.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments
Referring to fig. 1-2, a hollow electrostatic speaker with a passive radiation structure includes a hollow electrostatic diaphragm 1, a passive radiation diaphragm 2, a first hollow electrode plate 3 with a hole, a second hollow electrode plate 4 with a hole, a first outer ring diaphragm support 5, a second outer ring diaphragm support 6, a first inner ring diaphragm support 7, a second inner ring diaphragm support 8, a first damper 9, and a second damper 10, and at the same time, the first damper 9, the first hollow electrode plate 3 with a hole, the first outer ring diaphragm support 5, the first inner ring diaphragm support 7, the hollow electrostatic diaphragm 1, the passive radiation diaphragm 2, the second inner ring diaphragm support 8, the second outer ring diaphragm support 6, the second hollow electrode plate 4 with a hole, and the second damper 10 are assembled in this order;
the audio signal of the input unit is played back by an active electrostatic loudspeaking structure and a passive radiation structure, a first hollow electrode plate 3 with a hole, a first outer ring diaphragm support 5, a first inner ring diaphragm support 7, a hollow electrostatic diaphragm 1, a second inner ring diaphragm support 8, a second outer ring diaphragm support 6 and a second hollow electrode plate 4 with a hole jointly form the active electrostatic loudspeaking structure, and a first damping 9, a first inner ring diaphragm support 7, a passive radiation diaphragm 2, a second inner ring diaphragm support 8 and a second damping 10 jointly form the passive radiation structure.
The first hollow electrode plate 3, the first outer ring vibrating diaphragm bracket 5, the hollow electrostatic vibrating diaphragm 1, the second outer ring vibrating diaphragm bracket 6 and the second hollow electrode plate 4 are all round, have equal radius, are overlapped in circle center and are coaxially arranged; the first damper 9, the first inner ring diaphragm support 7, the passive radiation diaphragm 2, the second inner ring diaphragm support 8 and the second damper 10 are circular, have equal radius, are superposed and are coaxially arranged; hollow static vibrating diaphragm 1, passive radiation vibrating diaphragm 2 are in the coplanar, are coaxial arranging.
The first hollow electrode plate 3, the hollow electrostatic diaphragm 1 and the second hollow electrode plate 4 are hollow and annular, and the diameters of the hollow areas are equal to or slightly smaller than the outer diameters of the first damper 9, the first inner ring diaphragm support 7, the passive radiation diaphragm 2, the second inner ring diaphragm support 8 and the second damper 9.
The first outer ring diaphragm support 5 and the second outer ring diaphragm support 6 are both provided with a conductive coating on one side facing the hollow electrostatic diaphragm 1, and the shapes and the areas of the conductive coatings are the same.
The punching shapes of the first hollow electrode plate 3 and the second hollow electrode plate 4 are uniformly distributed in a round shape, the surface hole areas of the first hollow electrode plate 3 and the second hollow electrode plate 4 are the same, the hole opening rate is 60% -85%, and the diameter of a single round punching hole on the first hollow electrode plate 3 and the second hollow electrode plate 4 is 0.8mm-3 mm.
The passive radiation diaphragm 2 is made of a non-conductive film material, and a flexible suspended edge structure is formed at the edge part of the passive radiation diaphragm and is fixed on a first inner ring diaphragm support 7 and a second inner ring diaphragm support 8.
The surface tension of the hollow electrostatic diaphragm 1 is 1kPa-5kPa, the surface stress of the passive radiation diaphragm 2 is zero, and the hollow electrostatic diaphragm is in a stress-free state.
The first hollow electrode plate 3, the first outer ring diaphragm support 5, the first inner ring diaphragm support 7, the second inner ring diaphragm support 8, the second outer ring diaphragm support 6 and the second hollow electrode plate 4 are all PCB plates, and no conductive structure is formed on the surfaces of the first inner ring diaphragm support 7 and the second inner ring diaphragm support 8.
The first damper 9 and the second damper 10 are both made of porous sound-absorbing materials.
It should be noted that, referring to fig. 1-2, the electrostatic speaker provided in this embodiment has the same structure as the conventional electrostatic speaker, in that the overall sandwich structure of the active electrostatic speaker portion and the conventional electrostatic speaker in the invention is not different.
Referring to fig. 1-2, the electrostatic speaker according to the present embodiment is different from the conventional electrostatic speaker system in that a full-band audio signal is not played back by a single active speaker unit, but is distributed and radiated by the active and passive speaker structures through the active and passive radiation structures, and is coupled to a full-band high-power signal in a sound field.
Referring to fig. 1, there is no gap between the first hollow electrode plate 3 and the first outer ring diaphragm support 5, and there is no gap between the second hollow electrode plate 4 and the second outer ring diaphragm support 6. The structure can be realized on a glass fiber PCB (printed Circuit Board) by etching a double-sided copper-clad plate, and the thicknesses of the first hollow electrode plate 3 and the second hollow electrode plate 4 are preferably 2mm, so that the integral rigidity of the unit is improved, and high-order resonance generated by the hollow electrostatic diaphragm 1 in the interlayer under loud sound is inhibited.
It should be noted that there is no gap between the first hollow electrode plate 3 and the first inner ring diaphragm support 7, and there is no gap between the second hollow electrode plate 4 and the second inner ring diaphragm support 8, which is different from the aforementioned etching process for the double-sided copper-clad plate.
Referring to fig. 2, the edge portion of the passive radiation diaphragm 2 is provided with an elastic suspended edge structure, which can be realized by pressing a PET film of a conventional moving-coil speaker unit.
The reason for adopting the above setting mode is that the passive radiation diaphragm 2 can produce larger amplitude displacement under stronger acoustic power, and the suspended edge structure can help the film material to produce good elasticity, reduce the surface stress produced by the passive radiation diaphragm 2 under small amplitude displacement, share the external radiation power of sufficient low-frequency signals, and improve the attenuation time of the vibration of the passive radiation diaphragm 2.
In addition, the different parts of hollow electrostatic diaphragm 1 structure and conventional electrostatic loudspeaker diaphragm structure lie in, and the sound vibration stiff end of hollow electrostatic diaphragm 1 does not confine the outer lane border of traditional diaphragm structure to, but sets up in inner circle border and outer lane border simultaneously to improve electrostatic diaphragm's bulk rigidity, reduce electrostatic diaphragm's maximum amplitude displacement under the strong acoustic power, avoid electrostatic diaphragm and the high-power risk of burning out that the polar plate short circuit leads to.
As shown in FIG. 1, the first damper 9 and the second damper 10 are made of porous sound-absorbing material, and there may be a difference in thickness between them in engineering application, preferably the thickness is 1.5mm-3mm, the best acoustic impedance effect is affected by the material, and the best thickness range is 1.5mm-2mm under polyurethane material.
The reason for adopting above-mentioned mode of setting up is that porous sound absorbing material has the effect of decay medium-high frequency signal in the acoustic transmission in-process, and first damping 9, second damping 10 just correspond with passive radiation vibrating diaphragm 2 and arrange, can attenuate the high-frequency harmonic that passive radiation vibrating diaphragm 2 produced at passive vibration in-process, make passive radiation vibrating diaphragm not produce the interference to active static speaker structure in the medium-high sound region.
As shown in fig. 1 to 2, the preferable ratio of the hollow inner diameter of the hollow electrostatic diaphragm 1 to the outer diameter of the hollow electrostatic diaphragm 1 is in the range of 42% to 55%.
As shown in fig. 2, the preferred ratio of the width of the suspended edge structure of the passive radiation diaphragm 2 to the radius of the passive radiation diaphragm 2 is in the range of 15% to 20%.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a hollow electrostatic speaker with passive radiation structure, includes first damping, second damping, porose first hollow electrode board, porose second hollow electrode board, first outer loop vibrating diaphragm support, second outer loop vibrating diaphragm support, first inner loop vibrating diaphragm support, second inner loop vibrating diaphragm support, hollow electrostatic diaphragm, passive radiation vibrating diaphragm, and the both sides surface of hollow electrostatic diaphragm all is formed with the conductive coating. Meanwhile, the first damper, the first hollow electrode plate with the hole, the first outer ring diaphragm support, the first inner ring diaphragm support, the hollow electrostatic diaphragm, the passive radiation diaphragm, the second inner ring diaphragm support, the second outer ring diaphragm support, the second hollow electrode plate with the hole and the second damper are assembled in sequence. The method is characterized in that: the first hollow electrode plate with the hole, the first outer ring diaphragm support, the first inner ring diaphragm support, the hollow electrostatic diaphragm, the second inner ring diaphragm support, the second outer ring diaphragm support and the second hollow electrode plate with the hole jointly form an electrostatic loudspeaking structure; the first damping, the first inner ring diaphragm support, the passive radiation diaphragm, the second inner ring radiation support and the second damping form a bass passive radiation structure together.
2. The hollow electrostatic speaker with the passive radiation structure as claimed in claim 1, wherein the first hollow electrode plate, the first outer ring diaphragm support, the hollow electrostatic diaphragm, the second outer ring diaphragm support, and the second hollow electrode plate are all circular, have equal radii, have coincident centers, and are coaxially arranged; the first damper, the first inner ring diaphragm support, the passive radiation diaphragm, the second inner ring diaphragm support and the second damper are circular, have equal radiuses, are superposed and are coaxially arranged; the hollow electrostatic vibrating diaphragm and the passive radiation vibrating diaphragm are in the same plane and coaxially arranged.
3. The hollow electrostatic speaker with passive radiating structure as claimed in claim 2, wherein the first hollow electrode plate, the hollow electrostatic diaphragm, and the second hollow electrode plate are hollow ring-shaped, and the diameter of the hollow region (for industrial assembly) is equal to or slightly smaller than the outer diameter of the first damper, the first inner ring diaphragm support, the passive radiating diaphragm, the second inner ring diaphragm support, and the second damper.
4. The hollow electrostatic speaker with the passive radiation structure as claimed in claim 1, wherein the first outer ring diaphragm support and the second outer ring diaphragm support are each provided with a conductive coating on a single side facing the hollow electrostatic diaphragm, and the conductive coatings have the same shape and area.
5. The hollow electrostatic speaker with the passive radiating structure as claimed in claim 1, wherein the punched holes of the first hollow electrode plate and the second hollow electrode plate are uniformly distributed in a circular shape, the perforated areas on the surfaces of the first hollow electrode plate and the second hollow electrode plate are the same, and the aperture ratio is 60% -85%.
6. The hollow electrostatic speaker with the passive radiating structure as claimed in claim 5, wherein the diameter of the single circular punched hole on the first hollow electrode plate and the second hollow electrode plate is 0.8mm-3 mm.
7. The hollow electrostatic speaker with a passive radiating structure as claimed in claim 1, wherein the passive radiating diaphragm is made of a non-conductive film material, and a flexible suspended edge structure is formed at an edge portion of the passive radiating diaphragm and is fixed to the first inner ring diaphragm support and the second inner ring diaphragm support.
8. The hollow electrostatic loudspeaker with the passive radiation structure as claimed in claim 1, wherein the surface tension of the hollow electrostatic diaphragm is 1kPa-5kPa, and the surface stress of the passive radiation diaphragm is zero and is in a stress-free state.
9. The hollow electrostatic speaker with the passive radiation structure of claim 5, wherein the first hollow electrode plate, the first outer ring diaphragm support, the first inner ring diaphragm support, the second outer ring diaphragm support, and the second hollow electrode plate are all PCB plates, and no conductive structure is formed on the surface of the first inner ring diaphragm support or the second inner ring diaphragm support.
10. The hollow electrostatic speaker with a passive radiating structure of claim 1, wherein the first damper and the second damper are both porous sound-absorbing materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110796388.0A CN113596691B (en) | 2021-07-14 | 2021-07-14 | Hollow electrostatic loudspeaker with passive radiation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110796388.0A CN113596691B (en) | 2021-07-14 | 2021-07-14 | Hollow electrostatic loudspeaker with passive radiation structure |
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| CN113596691A true CN113596691A (en) | 2021-11-02 |
| CN113596691B CN113596691B (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110796388.0A Active CN113596691B (en) | 2021-07-14 | 2021-07-14 | Hollow electrostatic loudspeaker with passive radiation structure |
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| ES172358A1 (en) * | 1943-11-02 | 1946-03-01 | Standard Electrica Sa | IMPROVEMENTS IN MICROPHONES |
| CH552325A (en) * | 1971-05-26 | 1974-07-31 | Antes Gregor | ELECTROSTATIC HEADPHONES. |
| JP2009117981A (en) * | 2007-11-02 | 2009-05-28 | Seiko Epson Corp | Control apparatus of electrostatic type transducer, control method of electrostatic type transducer, and ultrasonic speaker |
| JP2010016603A (en) * | 2008-07-03 | 2010-01-21 | Yamaha Corp | Electrostatic speaker |
| CN102300142A (en) * | 2010-06-25 | 2011-12-28 | 安桥株式会社 | Loudspeaker diaphragm and loudspeaker including the loudspeaker diaphragm |
| US20150104048A1 (en) * | 2012-05-31 | 2015-04-16 | Omron Corporation | Capacitance sensor, acoustic sensor, and microphone |
| WO2015116000A1 (en) * | 2014-01-28 | 2015-08-06 | Tgi Technology Private Limited | Acoustic structure with passive diaphragm |
| WO2018121701A1 (en) * | 2016-12-30 | 2018-07-05 | 头领科技（昆山）有限公司 | Electrostatic speaker structure |
| CN208143481U (en) * | 2018-04-24 | 2018-11-23 | 王丁宁 | A kind of electrostatic electroacoustic transducers |
| CN209642967U (en) * | 2019-06-13 | 2019-11-15 | 黄海 | A kind of combined type electrostatic electroacoustic transducer |
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2021
- 2021-07-14 CN CN202110796388.0A patent/CN113596691B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES172358A1 (en) * | 1943-11-02 | 1946-03-01 | Standard Electrica Sa | IMPROVEMENTS IN MICROPHONES |
| CH552325A (en) * | 1971-05-26 | 1974-07-31 | Antes Gregor | ELECTROSTATIC HEADPHONES. |
| JP2009117981A (en) * | 2007-11-02 | 2009-05-28 | Seiko Epson Corp | Control apparatus of electrostatic type transducer, control method of electrostatic type transducer, and ultrasonic speaker |
| JP2010016603A (en) * | 2008-07-03 | 2010-01-21 | Yamaha Corp | Electrostatic speaker |
| CN102300142A (en) * | 2010-06-25 | 2011-12-28 | 安桥株式会社 | Loudspeaker diaphragm and loudspeaker including the loudspeaker diaphragm |
| US20150104048A1 (en) * | 2012-05-31 | 2015-04-16 | Omron Corporation | Capacitance sensor, acoustic sensor, and microphone |
| WO2015116000A1 (en) * | 2014-01-28 | 2015-08-06 | Tgi Technology Private Limited | Acoustic structure with passive diaphragm |
| WO2018121701A1 (en) * | 2016-12-30 | 2018-07-05 | 头领科技（昆山）有限公司 | Electrostatic speaker structure |
| CN208143481U (en) * | 2018-04-24 | 2018-11-23 | 王丁宁 | A kind of electrostatic electroacoustic transducers |
| CN209642967U (en) * | 2019-06-13 | 2019-11-15 | 黄海 | A kind of combined type electrostatic electroacoustic transducer |
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| CN113596691B (en) | 2023-06-23 |
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