CN220234956U - Capacitance microphone - Google Patents
Capacitance microphone Download PDFInfo
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- CN220234956U CN220234956U CN202321567724.5U CN202321567724U CN220234956U CN 220234956 U CN220234956 U CN 220234956U CN 202321567724 U CN202321567724 U CN 202321567724U CN 220234956 U CN220234956 U CN 220234956U
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- pressure regulating
- pressure
- condenser microphone
- closed cavity
- volume
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 78
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 230000001681 protective effect Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000306 component Substances 0.000 description 17
- 230000035945 sensitivity Effects 0.000 description 11
- 239000003990 capacitor Substances 0.000 description 9
- 230000007613 environmental effect Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
The utility model provides a condenser microphone, comprising: a support assembly including a housing; the sound transmission assembly is at least partially arranged on the support assembly and comprises a vibrating diaphragm; a pressure regulating member coupled to at least the support assembly; and the power supply component supplies power for the sound transmission component. Wherein, shell, vibrating diaphragm and pressure regulating member constitute the closed chamber, and the sound transmission subassembly sets up in the closed chamber at least partially, is provided with the screw thread on the inner wall of shell, shell and pressure regulating member threaded connection, and pressure regulating member passes through the screw thread and upwards or down removes relative shell to make pressure regulating member change the volume and the pressure of closed chamber. Through the arrangement, the pressure regulating part can improve the pickup effect of the condenser microphone in a quiet environment and the robustness of the condenser microphone in a noisy environment.
Description
Technical Field
The utility model relates to the technical field of wind power, in particular to a capacitor microphone.
Background
Voiceprints refer to spectral patterns produced by plotting acoustic features through dedicated electroacoustic transducers, which are a collection of various acoustic feature patterns. For the wind driven generator, voiceprints are characteristic signals stable for a long time, aerodynamic noise signals caused by damage of the front edge of the blade can be extracted through a voiceprint identification technology, and then the damage state of the blade is evaluated.
The device for picking up the voiceprint signal is generally a capacitor microphone, the core component of which is a polar head, and the polar head consists of two metal films; when the sound wave causes vibration, the change of the distance between the metal films causes the change of the capacitance between the metal films, and the sound wave signal can be converted into an electric signal according to the change of the capacitance between the metal films. The capacitor microphone has the characteristics of small volume, wide frequency range, high fidelity and low cost, and is widely applied to electronic products such as communication equipment, household appliances and the like.
The application environment of the condenser microphone for picking up the voiceprint signal of the wind driven generator is complex, and the sensitivity of the condenser microphone needs to be adjusted frequently. The existing capacitor microphone adjusts the sensitivity of the microphone by changing the distance between the metal films or changing the external bias voltage of the metal films, and the adjustment method is complex in operation and cannot meet the requirement of the capacitor microphone on the pre-precision of the pickup effect in industrial operation scenes.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides the capacitance microphone with adjustable sensitivity.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a condenser microphone, comprising: a support assembly including a housing; the sound transmission assembly is at least partially arranged on the support assembly and comprises a vibrating diaphragm; a pressure regulating member coupled to at least the support assembly; and the power supply component supplies power for the sound transmission component. Wherein, shell, vibrating diaphragm and pressure regulating member constitute the closed chamber, and the sound transmission subassembly sets up in the closed chamber at least partially, is provided with the screw thread on the inner wall of shell, shell and pressure regulating member threaded connection, and pressure regulating member passes through the screw thread and upwards or down removes relative shell to make pressure regulating member change the volume and the pressure of closed chamber.
Further, the pressure regulating member includes a first regulation mode and a second regulation mode, and when the pressure regulating member is in the first regulation mode, the volume of the closed cavity is a first volume; when the pressure regulating part is in a second regulation mode, the volume of the closed cavity is a second volume; the first volume is greater than the second volume.
Further, when the pressure regulating member is in the first regulating mode, the pressure of the closed cavity is the first pressure; when the pressure regulating part is in a second regulating mode, the pressure of the closed cavity is a second pressure; the first pressure is less than the second pressure.
Further, the sound transmission assembly further comprises a back plate, and the vibrating diaphragm and the back plate form a capacitor structure for storing charges.
Further, the vibrating diaphragm is fixedly connected with the shell, and the back plate is fixedly connected with the pressure regulating piece.
Further, through holes are formed in the backboard and are uniformly formed in the upper surface of the backboard.
Further, the support assembly also includes a protective grille at least partially disposed on the housing.
Further, the protection grating is provided in a mesh structure.
Further, a pressure regulating hole is formed in the shell, and when the pressure regulating piece is arranged on the lower side of the pressure regulating hole, the closed cavity is communicated with an external space through the pressure regulating hole.
Further, the power assembly is at least partially electrically connected to the sound transmission assembly, and the power assembly is also at least partially electrically connected to the support assembly.
The sensitivity of the microphone assembly is adjusted by the pressure adjusting piece, so that the microphone can pick up tiny sound wave signals in a quiet environment and filter redundant noise in an environment with stronger noise, and the pickup effect of the microphone in the quiet environment and the robustness of the microphone in the environment with stronger noise are improved.
Drawings
Fig. 1 is a schematic diagram of the general structure of a condenser microphone according to the present utility model.
Fig. 2 is a schematic sectional view of a condenser microphone according to the present utility model.
Fig. 3 is a right-side view of the capacitive microphone according to the present utility model.
Fig. 4 is a schematic front view of the back plate of the present utility model.
Fig. 5 is a schematic top view of the back plate of the present utility model.
Detailed Description
In order to make the solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model in the specific embodiment of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiment of the present utility model. It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
As shown in fig. 1, as one implementation, a condenser microphone 100 includes a support assembly 11, a sound transmission assembly 12, a pressure regulator 13, and a power supply assembly 14. The support component 11 is at least partially connected with the sound transmission component 12, the support component 11 is also at least partially connected with the pressure regulating component 13, specifically, the support component 11 is fixedly connected with the sound transmission component 12, the support component 11 is in threaded connection with the pressure regulating component 13, and the support component 11 is used for supporting the sound transmission component 12 and the pressure regulating component 13 and is used for protecting the sound transmission component 12. The sound transmission assembly 12 is at least partially disposed on the pressure regulating member 13, specifically, the sound transmission assembly 12 is at least partially fixedly connected to the support assembly 11, and the sound transmission assembly 12 is used for converting acoustic signals into electrical signals. A pressure regulator 13 is at least partially arranged on the support assembly 11, the pressure regulator 13 being used to adjust the sensitivity of the sound transmission assembly 12. The power supply assembly 14 is at least partially connected to the sound transmission assembly 12, the power supply assembly 14 is also at least partially connected to the support assembly 11, specifically, the power supply assembly 14 is at least partially electrically connected to the sound transmission assembly 12, the power supply assembly 14 is also at least partially electrically connected to the support assembly 11, and the power supply assembly 14 can supply power to the sound transmission assembly 12. Through the arrangement mode, the pressure regulating piece 13 can regulate the sensitivity of the sound transmission component 12, so that the condenser microphone 100 can pick up tiny sound wave signals in a quiet environment and filter redundant noise in a stronger-noise environment, and the pickup effect of the condenser microphone 100 in the quiet environment and the robustness in the stronger-noise environment are improved. For clarity of explanation of the technical solution of the present application, the front side, the rear side, the left side, the right side, the upper side, and the lower side as shown in fig. 1 are also defined as the front, rear, left, right, up, and down directions of the condenser microphone 100 in the present embodiment.
As one implementation, the power supply assembly 14 includes a power supply 141 and a power supply line 142. The power source 141 is at least partially connected to the power supply line 142, and in particular, the power source 141 is at least partially electrically connected to the power supply line 142, and the power source 141 is configured to supply power to the microphone assembly 12. The power supply line 142 is at least partially connected to the sound transmission assembly 12, the power supply line 142 is also at least partially connected to the support assembly 11, specifically, the power supply line 142 is at least partially electrically connected to the sound transmission assembly 12, the power supply line 142 is also at least partially electrically connected to the support assembly 11, and the power supply line 142 is used for conducting the power generated by the power supply 141 to the sound transmission assembly 12.
As an implementation manner, the sound transmission assembly 12 includes a diaphragm 121 and a back plate 122, where the diaphragm 121 is at least partially connected to the support assembly 11, the back plate 122 is at least partially disposed on the pressure regulator 13, and the back plate 122 is also at least partially connected to the power supply assembly 14, and the diaphragm 121 and the back plate 122 can convert acoustic signals into electrical signals. Specifically, the diaphragm 121 is at least partially fixedly connected to the support assembly 11, the back plate 122 is at least partially electrically connected to the power supply assembly 14, and the back plate 122 is also at least partially fixedly connected to the pressure regulator 13. Because the diaphragm 121 is at least partially fixedly connected with the support assembly 11, the support assembly 11 is at least partially electrically connected with the power assembly 14, i.e. the diaphragm 121 is connected with the power assembly 14 through the support assembly 11, the back plate 122 is at least partially electrically connected with the power assembly 14, the diaphragm 121 and the back plate 122 form a capacitor structure for storing charges, i.e. the diaphragm 121 and the back plate 122 are both distributed with charges and capacitance values exist between the diaphragm 121 and the back plate 122. The diaphragm 121 may be made of a flexible material, the back plate 122 may be made of a rigid material, and when the condenser microphone 100 works, sound waves cause the diaphragm 121 to vibrate, the distance between the diaphragm 121 and the back plate 122 changes due to the vibration of the diaphragm 121, the capacitance value between the diaphragm 121 and the back plate 122 changes due to the change of the distance between the diaphragm 121 and the back plate 122, and then the potential difference between the diaphragm 121 and the back plate 122 changes. The through holes 1221 are arranged on the back plate 122, the through holes 1221 are uniformly formed on the upper surface of the back plate 122, and the air gap between the back plate 122 and the vibrating diaphragm 121 can generate film pressing damping, so that the frequency response bandwidth of the condenser microphone 100 is reduced, the film pressing damping can be reduced by the through holes 1221 on the back plate 122, and the problems of reduction of the frequency response bandwidth of the condenser microphone 100 and the like are avoided. By the above arrangement, the acoustic wave signal can be converted into the electric signal by the vibration of the diaphragm 121 caused by the acoustic wave, and the acoustic-electric conversion function of the condenser microphone 100 can be realized. Wherein, the upper surface of the back plate 122 refers to the surface of the back plate 122 near one end of the diaphragm 121.
As one implementation, the support assembly 11 includes a housing 111, a protective grille 112, and an enclosed cavity 113. The housing 111 is at least partly connected to the protective grating 112, the housing 111 is at least partly connected to the diaphragm 121, the housing 111 is also at least partly connected to the pressure regulator 13, and the housing 111 is used for supporting the protective grating 112, the diaphragm 121 and the pressure regulator 13. The pressure regulating member 13 is at least partially connected with the back plate 122, and the pressure regulating member 13 is used for supporting the back plate 122; the pressure regulating member 13 is provided as an insulator, and since the pressure regulating member 13 is at least partially connected to the back plate 122, the pressure regulating member 13 is at least partially connected to the housing 111, and the housing 111 is at least partially connected to the diaphragm 121, the pressure regulating member 13 also serves to block the flow of electric charges between the back plate 122 and the diaphragm 121, thereby improving the stability of the capacitance value between the diaphragm 121 and the back plate 122. A protective grille 112 is at least partially provided on the housing 111, the protective grille 112 serving to protect internal parts. Through the arrangement mode, the diaphragm 121, the shell 111 and the pressure regulating piece 13 form the closed cavity 113, and the sensitivity of the capacitor microphone 100 is adjusted by adjusting the pressure in the closed cavity 113, so that the applicability of the capacitor microphone 100 is improved.
Specifically, along the up-down direction of the condenser microphone 100, the protection grille 112 is at least partially sleeved on the outer edge of the upper end of the housing 111, and it is understood that the protection grille 112 may be further connected with the housing 111 by a threaded connection or a snap connection, and the protection grille 112 may be configured as a mesh structure, and this arrangement may enable the protection grille 112 to block space clutter. The diaphragm 121 is at least partially fixedly connected to the upper end of the housing 111, and the diaphragm 121 is disposed at the lower side of the protective grille 112, so that the protective grille 112 can protect the diaphragm 121. The pressure regulating element 13 is in threaded connection with the housing 111, the pressure regulating element 13 is fixedly connected with the back plate 122, the pressure regulating element 13 is arranged on the lower side of the diaphragm 121, the back plate 122 is arranged on the upper side of the pressure regulating element 13, namely, a closed cavity 113 is formed among the housing 111, the pressure regulating element 13 and the diaphragm 121, and the back plate 122 is arranged in the closed cavity 113. The pressure regulator 13 is movable up or down with respect to the housing 111 by threads, thereby changing the volume of the closed chamber 113 and changing the pressure of the closed chamber 113. When the pressure in the closed cavity 113 is high, the vibration amplitude of the vibrating diaphragm 121 caused by sound waves is low, and the vibration amplitude of the vibrating diaphragm 121 is low, so that the variation amplitude of the potential difference between the vibrating diaphragm 121 and the back plate 122 is low, and further the condenser microphone 100 can filter the environmental noise and enhance the robustness of the condenser microphone 100 under the working condition of strong environmental noise; when the pressure in the closed cavity 113 is smaller, the vibration amplitude of the vibrating diaphragm 121 is larger due to the sound wave, the change amplitude of the potential difference between the vibrating diaphragm 121 and the back plate 122 is larger due to the vibration amplitude of the vibrating diaphragm 121, so that the condenser microphone 100 can capture tiny sound wave signals in the installation environment, and the sensitivity of the condenser microphone 100 is improved.
Further, the pressure regulating member 13 includes a first regulation mode and a second regulation mode, and when the pressure regulating member 13 is in the first regulation mode, the volume of the closed cavity 113 is a first volume; when the pressure regulator 13 is in the second regulation mode, the volume of the closed cavity 113 is a second volume, the first volume being greater than the second volume. When the regulator 13 is in the first regulation mode, the pressure of the closed chamber 113 is the first pressure; when the regulator 13 is in the second regulation mode, the pressure of the closed chamber 113 is the second pressure; the first pressure is less than the second pressure. The pressure regulator 13 adjusts the sensitivity of the condenser microphone 100 by adjusting the volume and pressure of the closed cavity 113. Further, the casing 111 is provided with the pressure regulating hole 115, when the pressure regulating member 13 is located at the lower side of the pressure regulating hole, the closed cavity 113 is communicated to the external space through the pressure regulating hole 115, and at the moment, the pressure of the closed cavity 113 is basically the same as the pressure of the external space, so that the setting mode can calibrate the regulating precision of the pressure regulating member 13, and the regulating accuracy and reliability of the pressure regulating member 13 are improved; the pressure regulator 13 may change the volume and pressure of the closed cavity 113 when the pressure regulator 13 is located on the upper side of the pressure regulator 115 or when the pressure regulator 13 blocks the pressure regulator 115. When the pressure regulating element 13 is in the second regulation mode, the condenser microphone 100 is used in an environment with stronger environmental noise, the volume of the closed cavity 113 is reduced by moving the pressure regulating element 13 upwards, so that the pressure in the closed cavity 113 is increased, at the moment, the pressure in the closed cavity 113 is the second pressure, when the condenser microphone 100 receives the same sound wave signal, the vibration amplitude of the vibrating diaphragm 121 is smaller, the electric signal output by the sound transmission component 12 is weaker, and therefore, the condenser microphone 100 can filter the environmental noise and enhance the robustness of the condenser microphone 100 under the working condition with stronger environmental noise; when the pressure regulating element 13 is in the first regulation mode, the condenser microphone 100 is used in an environment with weaker environmental noise, the volume of the closed cavity 113 is increased by moving the pressure regulating element 13 downwards, so that the pressure in the closed cavity 113 is reduced, at the moment, the pressure in the closed cavity 113 is the first pressure, when the condenser microphone 100 receives the same sound wave signals, the vibration amplitude of the diaphragm 121 is larger, the electric signal output by the sound transmission component 12 is stronger, and therefore, the condenser microphone 100 can capture tiny sound wave signals in the installation environment, and the sensitivity of the condenser microphone 100 is improved. It can be understood that the casing 111 and the pressure regulator 13 may be connected by screw, or may be connected by a latch or a buckle; the pressure regulating member 13 may be a bolt, a piston rod, or the like, and the technical scheme that the pressure regulating member 13 can change the volume of the closed cavity 113 is within the protection scope of the present utility model. Through the arrangement mode, the condenser microphone 100 can output good sound quality in different use environments, and the pickup effect of the condenser microphone 100 in a quiet environment and the robustness of the condenser microphone 100 in a noisy environment are improved.
In the utility model, the shell 111, the pressure regulating element 13 and the vibrating diaphragm 121 form the closed cavity 113, and the pressure of the closed cavity 113 can be regulated by the pressure regulating element 13 in a connecting mode of the shell 111 and the pressure regulating element 13 in a threaded connection mode, so that the sensitivity of the condenser microphone 100 is regulated, and the applicability and the robustness of the condenser microphone 100 are improved.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (10)
1. A condenser microphone, comprising:
a support assembly including a housing;
a sound transmission assembly at least partially disposed on the support assembly and including a diaphragm;
a pressure regulating member coupled to at least the support assembly;
the power supply assembly supplies power to the sound transmission assembly;
it is characterized in that the method comprises the steps of,
the shell, the vibrating diaphragm and the pressure regulating piece form a closed cavity, the sound transmission assembly is at least partially arranged in the closed cavity, threads are arranged on the inner wall of the shell, the shell is in threaded connection with the pressure regulating piece, and the pressure regulating piece moves upwards or downwards relative to the shell through the threads, so that the volume and the pressure of the closed cavity are changed by the pressure regulating piece.
2. The condenser microphone of claim 1, wherein the pressure regulator comprises a first regulation mode and a second regulation mode, the volume of the closed cavity being a first volume when the pressure regulator is in the first regulation mode; when the pressure regulating piece is in the second regulation mode, the volume of the closed cavity is a second volume; the first volume is greater than the second volume.
3. The condenser microphone of claim 2, wherein the pressure of the closed cavity is a first pressure when the pressure regulator is in the first regulation mode; when the pressure regulating part is in the second regulating mode, the pressure of the closed cavity is a second pressure; the first pressure is less than the second pressure.
4. The condenser microphone of claim 1, wherein the sound transmission assembly further comprises a backplate, the diaphragm and backplate forming a capacitive structure for storing electrical charge.
5. The condenser microphone of claim 4, wherein the diaphragm is fixedly connected to the housing and the back plate is fixedly connected to the pressure regulator.
6. The condenser microphone according to claim 4, wherein the back plate is provided with through holes, and the through holes are uniformly formed on the upper surface of the back plate.
7. The condenser microphone of claim 1, wherein the support assembly further comprises a protective grille at least partially disposed on the housing.
8. The condenser microphone of claim 7, wherein the protective grille is provided in a mesh structure.
9. The condenser microphone of claim 1, wherein the housing is provided with a pressure regulating hole, and the closed cavity is communicated with an external space through the pressure regulating hole when the pressure regulating piece is positioned at the lower side of the pressure regulating hole; when the pressure regulating part is positioned on the upper side of the pressure regulating hole or the pressure regulating part blocks the pressure regulating hole, the pressure regulating part changes the volume and the pressure of the closed cavity.
10. The condenser microphone of claim 1, wherein the power supply assembly is at least partially electrically connected to the sound transmission assembly, and wherein the power supply assembly is also at least partially electrically connected to the support assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321567724.5U CN220234956U (en) | 2023-06-19 | 2023-06-19 | Capacitance microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321567724.5U CN220234956U (en) | 2023-06-19 | 2023-06-19 | Capacitance microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220234956U true CN220234956U (en) | 2023-12-22 |
Family
ID=89186135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321567724.5U Active CN220234956U (en) | 2023-06-19 | 2023-06-19 | Capacitance microphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220234956U (en) |
-
2023
- 2023-06-19 CN CN202321567724.5U patent/CN220234956U/en active Active
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